Common Weakness Enumeration
CWE-287
DiscouragedImproper Authentication
Abstraction: Class · Status: Draft
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
6645 vulnerabilities reference this CWE, most recent first.
CVE-2026-84840 (GCVE-0-2026-84840)
Vulnerability from cvelistv5 – Published: 2026-09-02 18:30 – Updated: 2026-09-02 19:04
VLAI
EPSS
VEX
Title
tsi-coop tsi-dpdp-cms Bootstrap Setup Endpoint InterceptingFilter.java missing authentication
Summary
A vulnerability was identified in tsi-coop tsi-dpdp-cms up to 0.5.0. This affects an unknown part of the file InterceptingFilter.java of the component Bootstrap Setup Endpoint. The manipulation leads to missing authentication. The attack can be initiated remotely. The exploit is publicly available and might be used. Upgrading to version 0.5.1 is able to mitigate this issue. Upgrading the affected component is recommended.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-02 19:02 UTC
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/398082 | vdb-entry |
| https://vuldb.com/vuln/398082/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-84840 | third-party-advisory |
| https://vuldb.com/submit/885658 | third-party-advisory |
| https://github.com/mano257200/TSI-DPDP-CMS-Unauth… | exploit |
| https://github.com/tsi-coop/tsi-dpdp-cms/blob/mai… | related |
| https://github.com/tsi-coop/tsi-dpdp-cms/releases… | patch |
| https://github.com/tsi-coop/tsi-dpdp-cms/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tsi-coop | tsi-dpdp-cms |
Affected:
0.1
Affected: 0.2 Affected: 0.3 Affected: 0.4 Affected: 0.5.0 Unaffected: 0.5.1 cpe:2.3:a:tsi-coop:tsi-dpdp-cms:*:*:*:*:*:*:*:* |
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CVE-2026-84839 (GCVE-0-2026-84839)
Vulnerability from cvelistv5 – Published: 2026-09-02 18:15 – Updated: 2026-09-03 15:03
VLAI
EPSS
VEX
Title
tsi-coop tsi-dpdp-cms Admin Console/DPO Compliance Console web.xml missing authentication
Summary
A vulnerability was determined in tsi-coop tsi-dpdp-cms up to 0.5.0. Affected by this issue is some unknown functionality of the file web.xml of the component Admin Console/DPO Compliance Console. Executing a manipulation can lead to missing authentication. It is possible to launch the attack remotely. The exploit has been publicly disclosed and may be utilized. Upgrading to version 0.5.1 can resolve this issue. It is suggested to upgrade the affected component.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-03 15:03 UTC
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/398081 | vdb-entry |
| https://vuldb.com/vuln/398081/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-84839 | third-party-advisory |
| https://vuldb.com/submit/885619 | third-party-advisory |
| https://github.com/mano257200/TSI-DPDP-CMS-Missin… | exploit |
| https://github.com/tsi-coop/tsi-dpdp-cms/blob/mai… | related |
| https://github.com/tsi-coop/tsi-dpdp-cms/releases… | patch |
| https://github.com/tsi-coop/tsi-dpdp-cms/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tsi-coop | tsi-dpdp-cms |
Affected:
0.1
Affected: 0.2 Affected: 0.3 Affected: 0.4 Affected: 0.5.0 Unaffected: 0.5.1 cpe:2.3:a:tsi-coop:tsi-dpdp-cms:*:*:*:*:*:*:*:* |
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CVE-2026-84831 (GCVE-0-2026-84831)
Vulnerability from cvelistv5 – Published: 2026-09-03 08:43 – Updated: 2026-09-03 12:34
VLAI
EPSS
VEX
Title
Mandatory MFA bypass before enrollment
Summary
SEPPmail Secure Email Gateway before 15.0.7 creates a fully privileged session before required multi-factor authentication enrollment is completed. An attacker with the password for an MFA-required but unenrolled account can access protected functionality without providing a second factor.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-03 12:34 UTC
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| SEPPmail AG | SEPPmail Secure Email Gateway (SEG) |
Affected:
0 , < 15.0.7
(custom)
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CVE-2026-84423 (GCVE-0-2026-84423)
Vulnerability from cvelistv5 – Published: 2026-09-01 22:45 – Updated: 2026-09-03 15:40
VLAI
EPSS
VEX
Title
Casdoor upload-resource API resource.go missing authentication
Summary
A vulnerability has been found in Casdoor up to 4.0.0. This affects an unknown function of the file controllers/resource.go of the component upload-resource API. Such manipulation leads to missing authentication. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor deleted the GitHub issue for this vulnerability without any explanation. Afterwards the vendor was contacted early about this disclosure via email but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-03 15:40 UTC
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/397791 | vdb-entry |
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| https://vuldb.com/cve/CVE-2026-84423 | third-party-advisory |
| https://vuldb.com/submit/883037 | third-party-advisory |
| https://github.com/casdoor/casdoor/issues/5617 | issue-tracking |
| https://github.com/geo-chen/oss/blob/main/casdoor… | exploit |
| https://github.com/casdoor/casdoor/ | product |
Impacted products
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CVE-2026-84114 (GCVE-0-2026-84114)
Vulnerability from cvelistv5 – Published: 2026-09-01 14:45 – Updated: 2026-09-01 18:05
VLAI
EPSS
VEX
Title
Cleo Harmony SAML Authentication LocalUserUtil.getNativeUserByAssertions improper authentication
Summary
A vulnerability has been found in Cleo Harmony up to 5.8.1.10. Impacted is the function LocalUserUtil.getNativeUserByAssertions of the component SAML Authentication. Such manipulation of the argument Email leads to improper authentication. The attack can be executed remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 5.8.1.11 is recommended to address this issue. Upgrading the affected component is recommended.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-01 16:54 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/397557 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/397557/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-84114 | third-party-advisory |
| https://vuldb.com/submit/882467 | third-party-advisory |
| https://support.cleo.com/hc/en-us/articles/302584… | broken-linkpatch |
Impacted products
1 product
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CVE-2026-83961 (GCVE-0-2026-83961)
Vulnerability from cvelistv5 – Published: 2026-09-03 15:27 – Updated: 2026-09-03 16:09
VLAI
EPSS
VEX
Title
ColdFusion | Improper Authentication (CWE-287)
Summary
ColdFusion is affected by an Improper Authentication vulnerability that could result in privilege escalation. An attacker could leverage this vulnerability to gain limited read and write access. The vulnerable component is restricted to an administrative network zone by default. Exploitation of this issue does not require user interaction. Scope is changed.
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-03 16:09 UTC
CWE
- CWE-287 - Improper Authentication (CWE-287)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://helpx.adobe.com/security/products/coldfus… | vendor-advisory |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Adobe | ColdFusion 2025 |
Affected:
0 , ≤ 2025.0.11
(custom)
Unaffected: 2025.0.12 (custom) |
|
| Adobe | ColdFusion 2023 |
Affected:
0 , ≤ 2023.0.22
(custom)
Unaffected: 2023.0.23 (custom) |
Date Public
2026-08-11 17:00
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CVE-2026-82980 (GCVE-0-2026-82980)
Vulnerability from cvelistv5 – Published: 2026-09-18 01:26 – Updated: 2026-09-18 19:42
VLAI
EPSS
VEX
Summary
Any authenticated user can lock or unlock files they do not own by targeting absolute WebDAV paths of other users. The DAV plugin resolves files from the absolute request URI without verifying that the path segment matches the authenticated session user. This enables:
Cross-user manual locks : attacker locks a victim's files, blocking writes (PUT/MOVE/DELETE, editor saves).
Lock-token disclosure: the app returns the lock token to unauthorized callers, enabling them to remove token-based locks (client locks) of other users.
Severity
6.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 19:42 UTC
CWE
- CWE-287 - Improper Authentication - Generic
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Nextcloud | Files Lock |
Affected:
31.0.0 , ≤ 33.0.0
(semver)
|
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CVE-2026-82919 (GCVE-0-2026-82919)
Vulnerability from cvelistv5 – Published: 2026-08-31 21:00 – Updated: 2026-08-31 21:57
VLAI
EPSS
VEX
Title
cu silicon edit Endpoint views.py create_app missing authentication
Summary
A vulnerability was identified in cu silicon up to 0.1.5. Affected by this vulnerability is the function create_app of the file views.py of the component edit Endpoint. Such manipulation leads to missing authentication. The attack may be performed from remote. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 21:36 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/397299 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/397299/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-82919 | third-party-advisory |
| https://vuldb.com/submit/879029 | third-party-advisory |
Impacted products
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CVE-2026-82906 (GCVE-0-2026-82906)
Vulnerability from cvelistv5 – Published: 2026-08-31 20:00 – Updated: 2026-09-01 16:07
VLAI
EPSS
VEX
Title
sdcb chats Signed File Download Endpoint FileController.cs DownloadPublic missing authentication
Summary
A flaw has been found in sdcb chats up to 1.12.0. This impacts the function DownloadPublic of the file src/BE/web/Controllers/Chats/Files/FileController.cs of the component Signed File Download Endpoint. This manipulation causes missing authentication. Remote exploitation of the attack is possible. The attack's complexity is rated as high. The exploitability is said to be difficult. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-01 16:07 UTC
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/397286 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/397286/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-82906 | third-party-advisory |
| https://vuldb.com/submit/877767 | third-party-advisory |
| https://github.com/yaowenxiao721/Poc/blob/main/sd… | exploit |
Impacted products
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CVE-2026-82758 (GCVE-0-2026-82758)
Vulnerability from cvelistv5 – Published: 2026-09-07 22:32 – Updated: 2026-09-08 14:41
VLAI
EPSS
VEX
Title
ash_authentication_oauth2_server treats an empty resolved secret as valid, opening the gated Dynamic Client Registration endpoint
Summary
Improper Authentication vulnerability in ash-project ash_authentication_oauth2_server allows an unauthenticated attacker to register OAuth clients even when Dynamic Client Registration is gated by an initial access token.
resolve_secret/3 in AshAuthentication.Oauth2Server (reached through __resolve_secret__!) treated any return other than {:ok, _} or :error from a configured {module, function, args} or 2-arity-function secret provider as a valid secret, wrapping nil, false, or "" as {:ok, value}. When the initial_access_token resolves to such an empty value, POST /oauth/register compares the presented bearer token against it and the comparison passes with no token supplied, so registration is open although it was configured closed. The same fail-open affected other resolved secrets such as signing_secret.
This issue affects ash_authentication_oauth2_server: from 0.1.0 before 0.3.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 14:40 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/ash-project/ash_authentication… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-82758.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-82758 | related |
| https://github.com/ash-project/ash_authentication… | patch |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| ash-project | ash_authentication_oauth2_server |
Affected:
0.1.0 , < 0.3.1
(semver)
cpe:2.3:a:ash-project:ash_authentication_oauth2_server:*:*:*:*:*:*:*:* |
|
| ash-project | ash_authentication_oauth2_server |
Affected:
855b578037c5ded18e8a6e60f42e56bde4905fae , < 30a87101871775d27d79f9ad6f29eafa4779e118
(git)
cpe:2.3:a:ash-project:ash_authentication_oauth2_server:*:*:*:*:*:*:*:* |
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"value": "\u003cp\u003eImproper Authentication vulnerability in ash-project ash_authentication_oauth2_server allows an unauthenticated attacker to register OAuth clients even when Dynamic Client Registration is gated by an initial access token.\u003c/p\u003e\n\u003cp\u003e\u003ccode\u003eresolve_secret/3\u003c/code\u003e in \u003ccode\u003eAshAuthentication.Oauth2Server\u003c/code\u003e (reached through \u003ccode\u003e__resolve_secret__!\u003c/code\u003e) treated any return other than \u003ccode\u003e{:ok, _}\u003c/code\u003e or \u003ccode\u003e:error\u003c/code\u003e from a configured \u003ccode\u003e{module, function, args}\u003c/code\u003e or 2-arity-function secret provider as a valid secret, wrapping \u003ccode\u003enil\u003c/code\u003e, \u003ccode\u003efalse\u003c/code\u003e, or \u003ccode\u003e\"\"\u003c/code\u003e as \u003ccode\u003e{:ok, value}\u003c/code\u003e. When the \u003ccode\u003einitial_access_token\u003c/code\u003e resolves to such an empty value, \u003ccode\u003ePOST /oauth/register\u003c/code\u003e compares the presented bearer token against it and the comparison passes with no token supplied, so registration is open although it was configured closed. The same fail-open affected other resolved secrets such as \u003ccode\u003esigning_secret\u003c/code\u003e.\u003c/p\u003e\n\u003cp\u003eThis issue affects ash_authentication_oauth2_server: from 0.1.0 before 0.3.1.\u003c/p\u003e"
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"value": "Improper Authentication vulnerability in ash-project ash_authentication_oauth2_server allows an unauthenticated attacker to register OAuth clients even when Dynamic Client Registration is gated by an initial access token.\n\n`resolve_secret/3` in `AshAuthentication.Oauth2Server` (reached through `__resolve_secret__!`) treated any return other than `{:ok, _}` or `:error` from a configured `{module, function, args}` or 2-arity-function secret provider as a valid secret, wrapping `nil`, `false`, or `\"\"` as `{:ok, value}`. When the `initial_access_token` resolves to such an empty value, `POST /oauth/register` compares the presented bearer token against it and the comparison passes with no token supplied, so registration is open although it was configured closed. The same fail-open affected other resolved secrets such as `signing_secret`.\n\nThis issue affects ash_authentication_oauth2_server: from 0.1.0 before 0.3.1."
}
],
"value": "Improper Authentication vulnerability in ash-project ash_authentication_oauth2_server allows an unauthenticated attacker to register OAuth clients even when Dynamic Client Registration is gated by an initial access token.\n\nresolve_secret/3 in AshAuthentication.Oauth2Server (reached through __resolve_secret__!) treated any return other than {:ok, _} or :error from a configured {module, function, args} or 2-arity-function secret provider as a valid secret, wrapping nil, false, or \"\" as {:ok, value}. When the initial_access_token resolves to such an empty value, POST /oauth/register compares the presented bearer token against it and the comparison passes with no token supplied, so registration is open although it was configured closed. The same fail-open affected other resolved secrets such as signing_secret.\n\nThis issue affects ash_authentication_oauth2_server: from 0.1.0 before 0.3.1."
}
],
"impacts": [
{
"capecId": "CAPEC-115",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-115 Authentication Bypass"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "LOW",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-287",
"description": "CWE-287 Improper Authentication",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-07T22:32:17.027Z",
"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"shortName": "EEF"
},
"references": [
{
"tags": [
"vendor-advisory",
"related"
],
"url": "https://github.com/ash-project/ash_authentication_oauth2_server/security/advisories/GHSA-fxc6-vp68-87pw"
},
{
"tags": [
"related"
],
"url": "https://cna.erlef.org/cves/CVE-2026-82758.html"
},
{
"tags": [
"related"
],
"url": "https://osv.dev/vulnerability/EEF-CVE-2026-82758"
},
{
"tags": [
"patch"
],
"url": "https://github.com/ash-project/ash_authentication_oauth2_server/commit/30a87101871775d27d79f9ad6f29eafa4779e118"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "ash_authentication_oauth2_server treats an empty resolved secret as valid, opening the gated Dynamic Client Registration endpoint"
}
},
"cveMetadata": {
"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"assignerShortName": "EEF",
"cveId": "CVE-2026-82758",
"datePublished": "2026-09-07T22:32:17.027Z",
"dateReserved": "2026-08-31T01:00:10.817Z",
"dateUpdated": "2026-09-08T14:41:06.227Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Mitigation
Architecture and Design
Strategy: Libraries or Frameworks
Use an authentication framework or library such as the OWASP ESAPI Authentication feature.
CAPEC-114: Authentication Abuse
An attacker obtains unauthorized access to an application, service or device either through knowledge of the inherent weaknesses of an authentication mechanism, or by exploiting a flaw in the authentication scheme's implementation. In such an attack an authentication mechanism is functioning but a carefully controlled sequence of events causes the mechanism to grant access to the attacker.
CAPEC-115: Authentication Bypass
An attacker gains access to application, service, or device with the privileges of an authorized or privileged user by evading or circumventing an authentication mechanism. The attacker is therefore able to access protected data without authentication ever having taken place.
CAPEC-151: Identity Spoofing
Identity Spoofing refers to the action of assuming (i.e., taking on) the identity of some other entity (human or non-human) and then using that identity to accomplish a goal. An adversary may craft messages that appear to come from a different principle or use stolen / spoofed authentication credentials.
CAPEC-194: Fake the Source of Data
An adversary takes advantage of improper authentication to provide data or services under a falsified identity. The purpose of using the falsified identity may be to prevent traceability of the provided data or to assume the rights granted to another individual. One of the simplest forms of this attack would be the creation of an email message with a modified "From" field in order to appear that the message was sent from someone other than the actual sender. The root of the attack (in this case the email system) fails to properly authenticate the source and this results in the reader incorrectly performing the instructed action. Results of the attack vary depending on the details of the attack, but common results include privilege escalation, obfuscation of other attacks, and data corruption/manipulation.
CAPEC-22: Exploiting Trust in Client
An attack of this type exploits vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by communicating directly with the server where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
CAPEC-57: Utilizing REST's Trust in the System Resource to Obtain Sensitive Data
This attack utilizes a REST(REpresentational State Transfer)-style applications' trust in the system resources and environment to obtain sensitive data once SSL is terminated.
CAPEC-593: Session Hijacking
This type of attack involves an adversary that exploits weaknesses in an application's use of sessions in performing authentication. The adversary is able to steal or manipulate an active session and use it to gain unathorized access to the application.
CAPEC-633: Token Impersonation
An adversary exploits a weakness in authentication to create an access token (or equivalent) that impersonates a different entity, and then associates a process/thread to that that impersonated token. This action causes a downstream user to make a decision or take action that is based on the assumed identity, and not the response that blocks the adversary.
CAPEC-650: Upload a Web Shell to a Web Server
By exploiting insufficient permissions, it is possible to upload a web shell to a web server in such a way that it can be executed remotely. This shell can have various capabilities, thereby acting as a "gateway" to the underlying web server. The shell might execute at the higher permission level of the web server, providing the ability the execute malicious code at elevated levels.
CAPEC-94: Adversary in the Middle (AiTM)
An adversary targets the communication between two components (typically client and server), in order to alter or obtain data from transactions. A general approach entails the adversary placing themself within the communication channel between the two components.