CWE-352
AllowedCross-Site Request Forgery (CSRF)
Abstraction: Compound · Status: Stable
The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.
14231 vulnerabilities reference this CWE, most recent first.
GHSA-QC5W-PJXJ-HXGF
Vulnerability from github – Published: 2022-05-17 04:12 – Updated: 2022-05-17 04:12Multiple cross-site request forgery (CSRF) vulnerabilities in the Invoice module 6.x-1.x before 6.x-1.2 and 7.x-1.x before 7.x-1.3 for Drupal allow remote attackers to hijack the authentication of arbitrary users for requests that (1) create, (2) delete, or (3) alter invoices via unspecified vectors.
{
"affected": [],
"aliases": [
"CVE-2015-4382"
],
"database_specific": {
"cwe_ids": [
"CWE-352"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2015-06-15T14:59:00Z",
"severity": "MODERATE"
},
"details": "Multiple cross-site request forgery (CSRF) vulnerabilities in the Invoice module 6.x-1.x before 6.x-1.2 and 7.x-1.x before 7.x-1.3 for Drupal allow remote attackers to hijack the authentication of arbitrary users for requests that (1) create, (2) delete, or (3) alter invoices via unspecified vectors.",
"id": "GHSA-qc5w-pjxj-hxgf",
"modified": "2022-05-17T04:12:24Z",
"published": "2022-05-17T04:12:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2015-4382"
},
{
"type": "WEB",
"url": "https://www.drupal.org/node/2459337"
},
{
"type": "WEB",
"url": "https://www.drupal.org/node/2474135"
},
{
"type": "WEB",
"url": "https://www.drupal.org/node/2474139"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2015/04/25/6"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/74345"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-QC63-7RF8-9P8X
Vulnerability from github – Published: 2025-04-01 15:31 – Updated: 2026-04-01 18:34Cross-Site Request Forgery (CSRF) vulnerability in Aphotrax Uptime Robot Plugin for WordPress allows Cross Site Request Forgery. This issue affects Uptime Robot Plugin for WordPress: from n/a through 2.3.
{
"affected": [],
"aliases": [
"CVE-2025-31776"
],
"database_specific": {
"cwe_ids": [
"CWE-352"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-04-01T15:16:15Z",
"severity": "MODERATE"
},
"details": "Cross-Site Request Forgery (CSRF) vulnerability in Aphotrax Uptime Robot Plugin for WordPress allows Cross Site Request Forgery. This issue affects Uptime Robot Plugin for WordPress: from n/a through 2.3.",
"id": "GHSA-qc63-7rf8-9p8x",
"modified": "2026-04-01T18:34:20Z",
"published": "2025-04-01T15:31:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-31776"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/wordpress/plugin/uptime-robot-monitor/vulnerability/wordpress-uptime-robot-plugin-2-3-cross-site-request-forgery-csrf-vulnerability?_s_id=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-QC7V-HC5R-FQ4J
Vulnerability from github – Published: 2022-05-24 19:14 – Updated: 2022-05-24 19:14emlog v6.0 contains a Cross-Site Request Forgery (CSRF) via /admin/link.php?action=addlink, which allows attackers to arbitrarily add articles.
{
"affected": [],
"aliases": [
"CVE-2020-21321"
],
"database_specific": {
"cwe_ids": [
"CWE-352"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-09-15T22:15:00Z",
"severity": "MODERATE"
},
"details": "emlog v6.0 contains a Cross-Site Request Forgery (CSRF) via /admin/link.php?action=addlink, which allows attackers to arbitrarily add articles.",
"id": "GHSA-qc7v-hc5r-fq4j",
"modified": "2022-05-24T19:14:53Z",
"published": "2022-05-24T19:14:53Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-21321"
},
{
"type": "WEB",
"url": "https://github.com/emlog/emlog/issues/50"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-QC92-Q864-M3MH
Vulnerability from github – Published: 2023-10-12 15:31 – Updated: 2024-04-04 08:35Cross-Site Request Forgery (CSRF) vulnerability in Fla-shop.Com Interactive World Map plugin <= 3.2.0 versions.
{
"affected": [],
"aliases": [
"CVE-2023-45060"
],
"database_specific": {
"cwe_ids": [
"CWE-352"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-10-12T13:15:10Z",
"severity": "HIGH"
},
"details": "Cross-Site Request Forgery (CSRF) vulnerability in Fla-shop.Com Interactive World Map plugin \u003c=\u00a03.2.0 versions.",
"id": "GHSA-qc92-q864-m3mh",
"modified": "2024-04-04T08:35:29Z",
"published": "2023-10-12T15:31:07Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-45060"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/vulnerability/interactive-world-map/wordpress-interactive-world-map-plugin-3-2-0-cross-site-request-forgery-csrf-vulnerability?_s_id=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-QCCM-WMCQ-PWR6
Vulnerability from github – Published: 2022-11-21 22:34 – Updated: 2022-12-01 22:12A vulnerability identified in the Tailscale client allows a malicious website to access the peer API, which can then be used to access Tailscale environment variables.
Affected platforms: All Patched Tailscale client versions: v1.32.3 or later, v1.33.257 or later (unstable)
What happened?
In the Tailscale client, the peer API was vulnerable to DNS rebinding. This allowed an attacker-controlled website visited by the node to rebind DNS for the peer API to an attacker-controlled DNS server, and then making peer API requests in the client, including accessing the node’s Tailscale environment variables.
Who is affected?
All Tailscale clients prior to version v.1.32.3 are affected.
What should I do?
Upgrade to v1.32.3 or later to remediate the issue.
What is the impact?
An attacker with access to the peer API on a node could use that access to read the node’s environment variables, including any credentials or secrets stored in environment variables. This may include Tailscale authentication keys, which could then be used to add new nodes to the user’s tailnet. The peer API access could also be used to learn of other nodes in the tailnet or send files via Taildrop.
An attacker with access to the peer API who sent a malicious file via Taildrop which was accessed while it was loading could use this to gain access to the local API, and remotely execute code.
There is no evidence of this vulnerability being purposefully triggered or exploited.
Credits
We would like to thank Emily Trau and Jamie McClymont (CyberCX) for reporting this issue. Further detail is available in their blog post.
References
For more information
If you have any questions or comments about this advisory, contact Tailscale support.
{
"affected": [
{
"package": {
"ecosystem": "Go",
"name": "tailscale.com/cmd"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.32.3"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2022-41925"
],
"database_specific": {
"cwe_ids": [
"CWE-200",
"CWE-352"
],
"github_reviewed": true,
"github_reviewed_at": "2022-11-21T22:34:22Z",
"nvd_published_at": "2022-11-23T19:15:00Z",
"severity": "LOW"
},
"details": "A vulnerability identified in the Tailscale client allows a malicious website to access the peer API, which can then be used to access Tailscale environment variables.\n\n**Affected platforms:** All\n**Patched Tailscale client versions:** v1.32.3 or later, v1.33.257 or later (unstable)\n\n### What happened?\nIn the Tailscale client, the peer API was vulnerable to DNS rebinding. This allowed an attacker-controlled website visited by the node to rebind DNS for the peer API to an attacker-controlled DNS server, and then making peer API requests in the client, including accessing the node\u2019s Tailscale environment variables.\n\n### Who is affected?\nAll Tailscale clients prior to version v.1.32.3 are affected.\n\n### What should I do?\nUpgrade to v1.32.3 or later to remediate the issue.\n\n### What is the impact?\nAn attacker with access to the peer API on a node could use that access to read the node\u2019s environment variables, including any credentials or secrets stored in environment variables. This may include Tailscale authentication keys, which could then be used to add new nodes to the user\u2019s tailnet. The peer API access could also be used to learn of other nodes in the tailnet or send files via Taildrop.\n\nAn attacker with access to the peer API who sent a malicious file via Taildrop which was accessed while it was loading could use this to gain access to the local API, and remotely execute code.\n\nThere is no evidence of this vulnerability being purposefully triggered or exploited.\n\n### Credits\nWe would like to thank [Emily Trau](https://github.com/emilytrau) and [Jamie McClymont (CyberCX)](https://twitter.com/JJJollyjim) for reporting this issue. Further detail is available in [their blog post](https://emily.id.au/tailscale).\n\n### References\n* [TS-2022-005](https://tailscale.com/security-bulletins/#ts-2022-005)\n* [Researcher blog post](https://emily.id.au/tailscale)\n\n### For more information\nIf you have any questions or comments about this advisory, [contact Tailscale support](https://tailscale.com/contact/support/).",
"id": "GHSA-qccm-wmcq-pwr6",
"modified": "2022-12-01T22:12:32Z",
"published": "2022-11-21T22:34:22Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/tailscale/tailscale/security/advisories/GHSA-qccm-wmcq-pwr6"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-41925"
},
{
"type": "WEB",
"url": "https://emily.id.au/tailscale"
},
{
"type": "PACKAGE",
"url": "https://github.com/tailscale/tailscale"
},
{
"type": "WEB",
"url": "https://tailscale.com/security-bulletins/#ts-2022-005"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N",
"type": "CVSS_V3"
}
],
"summary": "Tailscale daemon is vulnerable to information disclosure via CSRF"
}
GHSA-QCF6-5W34-WR94
Vulnerability from github – Published: 2022-05-17 03:42 – Updated: 2022-05-17 03:42Cross-site request forgery (CSRF) vulnerability in the Report Builder and Data Collection Component (DCC) in IBM Jazz Reporting Service (JRS) 5.x before 5.0.2 ifix016, 6.0 and 6.0.1 before 6.0.1 ifix005, and 6.0.2 before ifix002 allows remote authenticated users to hijack the authentication of arbitrary users.
{
"affected": [],
"aliases": [
"CVE-2016-2889"
],
"database_specific": {
"cwe_ids": [
"CWE-352"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2016-07-08T01:59:00Z",
"severity": "HIGH"
},
"details": "Cross-site request forgery (CSRF) vulnerability in the Report Builder and Data Collection Component (DCC) in IBM Jazz Reporting Service (JRS) 5.x before 5.0.2 ifix016, 6.0 and 6.0.1 before 6.0.1 ifix005, and 6.0.2 before ifix002 allows remote authenticated users to hijack the authentication of arbitrary users.",
"id": "GHSA-qcf6-5w34-wr94",
"modified": "2022-05-17T03:42:49Z",
"published": "2022-05-17T03:42:49Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2016-2889"
},
{
"type": "WEB",
"url": "http://www-01.ibm.com/support/docview.wss?uid=swg21983147"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/91766"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-QCF9-F8QC-C69H
Vulnerability from github – Published: 2022-05-13 01:34 – Updated: 2022-05-13 01:34A CSRF vulnerability in the Runtime Config component of Avaya Aura Orchestration Designer could allow an attacker to add, change, or remove administrative settings. Affected versions of Avaya Aura Orchestration Designer include all versions up to 7.2.1.
{
"affected": [],
"aliases": [
"CVE-2018-15612"
],
"database_specific": {
"cwe_ids": [
"CWE-352"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-09-21T17:29:00Z",
"severity": "HIGH"
},
"details": "A CSRF vulnerability in the Runtime Config component of Avaya Aura Orchestration Designer could allow an attacker to add, change, or remove administrative settings. Affected versions of Avaya Aura Orchestration Designer include all versions up to 7.2.1.",
"id": "GHSA-qcf9-f8qc-c69h",
"modified": "2022-05-13T01:34:14Z",
"published": "2022-05-13T01:34:14Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-15612"
},
{
"type": "WEB",
"url": "https://downloads.avaya.com/css/P8/documents/101052293"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-QCFQ-35V7-4FW7
Vulnerability from github – Published: 2022-05-24 17:10 – Updated: 2023-01-14 05:24A cross-site request forgery vulnerability in Jenkins Mac Plugin 1.1.0 and earlier allows attackers to connect to an attacker-specified SSH server using attacker-specified credentials.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "fr.edf.jenkins.plugins:mac"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.2.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2020-2147"
],
"database_specific": {
"cwe_ids": [
"CWE-352"
],
"github_reviewed": true,
"github_reviewed_at": "2023-01-14T05:24:41Z",
"nvd_published_at": "2020-03-09T16:15:00Z",
"severity": "MODERATE"
},
"details": "A cross-site request forgery vulnerability in Jenkins Mac Plugin 1.1.0 and earlier allows attackers to connect to an attacker-specified SSH server using attacker-specified credentials.",
"id": "GHSA-qcfq-35v7-4fw7",
"modified": "2023-01-14T05:24:41Z",
"published": "2022-05-24T17:10:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-2147"
},
{
"type": "WEB",
"url": "https://github.com/jenkinsci/mac-plugin/commit/86aebd3d33526d83d6cbc9aef7fb1f4831fb1805"
},
{
"type": "PACKAGE",
"url": "https://github.com/jenkinsci/mac-plugin"
},
{
"type": "WEB",
"url": "https://jenkins.io/security/advisory/2020-03-09/#SECURITY-1761"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2020/03/09/1"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
"type": "CVSS_V3"
}
],
"summary": "CSRF vulnerability in Mac Plugin"
}
GHSA-QCG7-G679-H3PP
Vulnerability from github – Published: 2021-12-07 00:00 – Updated: 2021-12-08 00:01b2evolution CMS v7.2.3 was discovered to contain a Cross-Site Request Forgery (CSRF) via the User login page. This vulnerability allows attackers to escalate privileges.
{
"affected": [],
"aliases": [
"CVE-2021-31631"
],
"database_specific": {
"cwe_ids": [
"CWE-352"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-12-06T22:15:00Z",
"severity": "HIGH"
},
"details": "b2evolution CMS v7.2.3 was discovered to contain a Cross-Site Request Forgery (CSRF) via the User login page. This vulnerability allows attackers to escalate privileges.",
"id": "GHSA-qcg7-g679-h3pp",
"modified": "2021-12-08T00:01:49Z",
"published": "2021-12-07T00:00:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-31631"
},
{
"type": "WEB",
"url": "https://gist.github.com/stacksmasher007/76514ab2b782fb4383f1121e6fc19241"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-QCGQ-C97Q-26VW
Vulnerability from github – Published: 2022-05-24 19:17 – Updated: 2022-10-25 19:00Multiple Plugins from the CatchThemes vendor do not perform capability and CSRF checks in the ctp_switch AJAX action, which could allow any authenticated users, such as Subscriber to change the Essential Widgets WordPress plugin before 1.9, To Top WordPress plugin before 2.3, Header Enhancement WordPress plugin before 1.5, Generate Child Theme WordPress plugin before 1.6, Essential Content Types WordPress plugin before 1.9, Catch Web Tools WordPress plugin before 2.7, Catch Under Construction WordPress plugin before 1.4, Catch Themes Demo Import WordPress plugin before 1.6, Catch Sticky Menu WordPress plugin before 1.7, Catch Scroll Progress Bar WordPress plugin before 1.6, Social Gallery and Widget WordPress plugin before 2.3, Catch Infinite Scroll WordPress plugin before 1.9, Catch Import Export WordPress plugin before 1.9, Catch Gallery WordPress plugin before 1.7, Catch Duplicate Switcher WordPress plugin before 1.6, Catch Breadcrumb WordPress plugin before 1.7, Catch IDs WordPress plugin before 2.4's configurations.
{
"affected": [],
"aliases": [
"CVE-2021-24752"
],
"database_specific": {
"cwe_ids": [
"CWE-284",
"CWE-352"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-10-18T14:15:00Z",
"severity": "MODERATE"
},
"details": "Multiple Plugins from the CatchThemes vendor do not perform capability and CSRF checks in the ctp_switch AJAX action, which could allow any authenticated users, such as Subscriber to change the Essential Widgets WordPress plugin before 1.9, To Top WordPress plugin before 2.3, Header Enhancement WordPress plugin before 1.5, Generate Child Theme WordPress plugin before 1.6, Essential Content Types WordPress plugin before 1.9, Catch Web Tools WordPress plugin before 2.7, Catch Under Construction WordPress plugin before 1.4, Catch Themes Demo Import WordPress plugin before 1.6, Catch Sticky Menu WordPress plugin before 1.7, Catch Scroll Progress Bar WordPress plugin before 1.6, Social Gallery and Widget WordPress plugin before 2.3, Catch Infinite Scroll WordPress plugin before 1.9, Catch Import Export WordPress plugin before 1.9, Catch Gallery WordPress plugin before 1.7, Catch Duplicate Switcher WordPress plugin before 1.6, Catch Breadcrumb WordPress plugin before 1.7, Catch IDs WordPress plugin before 2.4\u0027s configurations.",
"id": "GHSA-qcgq-c97q-26vw",
"modified": "2022-10-25T19:00:33Z",
"published": "2022-05-24T19:17:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-24752"
},
{
"type": "WEB",
"url": "https://wpscan.com/vulnerability/181a729e-fffe-457c-9e8d-a4343fd2e630"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
]
}
Mitigation MIT-4
Strategy: Libraries or Frameworks
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid [REF-1482].
- For example, use anti-CSRF packages such as the OWASP CSRFGuard. [REF-330]
- Another example is the ESAPI Session Management control, which includes a component for CSRF. [REF-45]
Mitigation
Ensure that the application is free of cross-site scripting issues (CWE-79), because most CSRF defenses can be bypassed using attacker-controlled script.
Mitigation
Generate a unique nonce for each form, place the nonce into the form, and verify the nonce upon receipt of the form. Be sure that the nonce is not predictable (CWE-330). [REF-332]
Mitigation
Identify especially dangerous operations. When the user performs a dangerous operation, send a separate confirmation request to ensure that the user intended to perform that operation.
Mitigation
- Use the "double-submitted cookie" method as described by Felten and Zeller:
- When a user visits a site, the site should generate a pseudorandom value and set it as a cookie on the user's machine. The site should require every form submission to include this value as a form value and also as a cookie value. When a POST request is sent to the site, the request should only be considered valid if the form value and the cookie value are the same.
- Because of the same-origin policy, an attacker cannot read or modify the value stored in the cookie. To successfully submit a form on behalf of the user, the attacker would have to correctly guess the pseudorandom value. If the pseudorandom value is cryptographically strong, this will be prohibitively difficult.
- This technique requires Javascript, so it may not work for browsers that have Javascript disabled. [REF-331]
Mitigation
Do not use the GET method for any request that triggers a state change.
Mitigation
Check the HTTP Referer header to see if the request originated from an expected page. This could break legitimate functionality, because users or proxies may have disabled sending the Referer for privacy reasons.
CAPEC-111: JSON Hijacking (aka JavaScript Hijacking)
An attacker targets a system that uses JavaScript Object Notation (JSON) as a transport mechanism between the client and the server (common in Web 2.0 systems using AJAX) to steal possibly confidential information transmitted from the server back to the client inside the JSON object by taking advantage of the loophole in the browser's Same Origin Policy that does not prohibit JavaScript from one website to be included and executed in the context of another website.
CAPEC-462: Cross-Domain Search Timing
An attacker initiates cross domain HTTP / GET requests and times the server responses. The timing of these responses may leak important information on what is happening on the server. Browser's same origin policy prevents the attacker from directly reading the server responses (in the absence of any other weaknesses), but does not prevent the attacker from timing the responses to requests that the attacker issued cross domain.
CAPEC-467: Cross Site Identification
An attacker harvests identifying information about a victim via an active session that the victim's browser has with a social networking site. A victim may have the social networking site open in one tab or perhaps is simply using the "remember me" feature to keep their session with the social networking site active. An attacker induces a payload to execute in the victim's browser that transparently to the victim initiates a request to the social networking site (e.g., via available social network site APIs) to retrieve identifying information about a victim. While some of this information may be public, the attacker is able to harvest this information in context and may use it for further attacks on the user (e.g., spear phishing).
CAPEC-62: Cross Site Request Forgery
An attacker crafts malicious web links and distributes them (via web pages, email, etc.), typically in a targeted manner, hoping to induce users to click on the link and execute the malicious action against some third-party application. If successful, the action embedded in the malicious link will be processed and accepted by the targeted application with the users' privilege level. This type of attack leverages the persistence and implicit trust placed in user session cookies by many web applications today. In such an architecture, once the user authenticates to an application and a session cookie is created on the user's system, all following transactions for that session are authenticated using that cookie including potential actions initiated by an attacker and simply "riding" the existing session cookie.