Common Weakness Enumeration
CWE-87
AllowedImproper Neutralization of Alternate XSS Syntax
Abstraction: Variant · Status: Draft
The product does not neutralize or incorrectly neutralizes user-controlled input for alternate script syntax.
98 vulnerabilities reference this CWE, most recent first.
CVE-2026-55661 (GCVE-0-2026-55661)
Vulnerability from cvelistv5 – Published: 2026-07-01 20:44 – Updated: 2026-07-06 14:39
VLAI
EPSS
VEX
Title
TinaCMS rich-text (slatejson) rendering does not sanitize link/image URLs, allowing stored XSS via dangerous URL schemes
Summary
Tina is a headless content management system. In versions prior to @tinacms/mdx 2.1.7 and tinacms 3.9.3, rich-text parsing and the default link/image renderers did not sanitize the url field on Slate link/image nodes. Content containing javascript: or data:text/html URLs — including case-variant, whitespace-padded, and control-character-obfuscated forms — is rendered into href/src and executes when the content is viewed. Any actor able to author rich-text content (for example a lower-privileged editor, or imported/external content) can achieve stored XSS against editors and site viewers. This issue is fixed in versions @tinacms/mdx 2.1.7 and tinacms 3.9.3.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/tinacms/tinacms/security/advis… | x_refsource_CONFIRM |
| https://github.com/tinacms/tinacms/pull/7056 | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| tinacms | tinacms |
Affected:
< 3.9.3
|
|
| tinacms | @tinacms/mdx |
Affected:
< 2.1.7
|
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CVE-2026-55237 (GCVE-0-2026-55237)
Vulnerability from cvelistv5 – Published: 2026-06-18 16:21 – Updated: 2026-06-18 17:32
VLAI
EPSS
VEX
Title
AutoGPT SignUp Page has DOM-Based XSS and Open Redirect
Summary
AutoGPT is a workflow automation platform for creating, deploying, and managing continuous artificial intelligence agents. Versions prior to 0.6.62 have a DOM-based Cross-Site Scripting (XSS) vulnerability in AutoGPT's signup page. The application improperly trusts a URL parameter (`next`), which is passed to `router.push`. An attacker can craft a malicious link that, when opened by an authenticated user, performs a client-side redirect and executes arbitrary JavaScript in the context of their browser. This could lead to credential theft, internal network pivoting, and unauthorized actions performed on behalf of the victim. Version 0.6.62 patches the issue.
Severity
8.8 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/Significant-Gravitas/AutoGPT/s… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Significant-Gravitas | AutoGPT |
Affected:
< 0.6.62
|
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CVE-2026-54002 (GCVE-0-2026-54002)
Vulnerability from cvelistv5 – Published: 2026-07-09 18:34 – Updated: 2026-07-09 19:26
VLAI
EPSS
VEX
Title
Kirby: Cross-site scripting (XSS) from incomplete HTML/XML sanitization in `Dom::sanitize()`
Summary
Kirby is an open-source content management system. Prior to 4.9.4 and 5.4.4, Kirby sites and plugins that use the writer or list fields or call Dom::sanitize(), Sane::sanitize(), Sane::Html::sanitize(), Sane::Svg::sanitize(), Sane::Xml::sanitize(), Sane::sanitizeFile(), or file sanitizeContents() with untrusted input allow malicious markup injected as children of an unknown HTML or XML tag to pass through Dom::sanitize() without being correctly sanitized, causing stored cross-site scripting. This issue is fixed in versions 4.9.4 and 5.4.4.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://github.com/getkirby/kirby/security/adviso… | x_refsource_CONFIRM |
| https://github.com/getkirby/kirby/commit/0f0437b5… | x_refsource_MISC |
| https://github.com/getkirby/kirby/commit/7ad76cf9… | x_refsource_MISC |
| https://github.com/getkirby/kirby/commit/9ec18738… | x_refsource_MISC |
| https://github.com/getkirby/kirby/commit/bb2562e1… | x_refsource_MISC |
| https://github.com/getkirby/kirby/releases/tag/4.9.4 | x_refsource_MISC |
| https://github.com/getkirby/kirby/releases/tag/5.4.4 | x_refsource_MISC |
Impacted products
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CVE-2026-46492 (GCVE-0-2026-46492)
Vulnerability from cvelistv5 – Published: 2026-06-09 16:09 – Updated: 2026-06-09 18:39
VLAI
EPSS
VEX
Title
md-fileserver: Stored/Reflected XSS when viewing Markdown (raw HTML allowed)
Summary
md-fileserver allows for local viewing of markdown files in a browser. Prior to version 1.10.3, a cross-site scripting (XSS) vulnerability exists in the application’s Markdown rendering logic. When user-supplied Markdown content is rendered, embedded raw HTML—including <script> tags—is processed and injected into the resulting page without sanitization, allowing arbitrary JavaScript execution in the context of the affected domain. This issue has been patched in version 1.10.3.
Severity
7.2 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/commenthol/md-fileserver/secur… | x_refsource_CONFIRM |
| https://github.com/commenthol/md-fileserver/relea… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| commenthol | md-fileserver |
Affected:
< 1.10.3
|
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CVE-2026-45314 (GCVE-0-2026-45314)
Vulnerability from cvelistv5 – Published: 2026-05-15 21:31 – Updated: 2026-05-18 19:44
VLAI
EPSS
VEX
Title
Open WebUI: XSS via SVG in /api/v1/channels/webhooks/{webhook_id}/profile/image
Summary
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.3, the channel webhook create/update flow accepts arbitrary profile_image_url values, including data:image/svg+xml;base64,... payloads. The profile image endpoint then decodes and serves this SVG as image/svg+xml without sanitization, allowing attacker-controlled script handlers (for example onload) to execute when the profile-image URL is opened in the browser. This vulnerability is fixed in 0.9.3.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-87 - Improper Neutralization of Alternate XSS Syntax
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/open-webui/open-webui/security… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open-webui | open-webui |
Affected:
< 0.9.3
|
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CVE-2026-42458 (GCVE-0-2026-42458)
Vulnerability from cvelistv5 – Published: 2026-05-15 17:02 – Updated: 2026-05-15 18:04
VLAI
EPSS
VEX
Title
Magento LTS: Reflected XSS - Import -> Data Flow (profiles)
Summary
Magento Long Term Support (LTS) is an unofficial, community-driven project provides an alternative to the Magento Community Edition e-commerce platform with a high level of backward compatibility. Prior to 20.18.0, there is a reflected XSS vulnerability under admin panel -> System -> Import/Export -> Dataflow - Profiles. This vulnerability is fixed in 20.18.0.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-87 - Improper Neutralization of Alternate XSS Syntax
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/OpenMage/magento-lts/security/… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| OpenMage | magento-lts |
Affected:
< 20.18.0
|
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CVE-2026-42235 (GCVE-0-2026-42235)
Vulnerability from cvelistv5 – Published: 2026-05-04 18:38 – Updated: 2026-05-05 14:40
VLAI
EPSS
VEX
Title
n8n: XSS via MCP OAuth client
Summary
n8n is an open source workflow automation platform. Prior to versions 1.123.32, 2.17.4, and 2.18.1, an unauthenticated attacker could register a malicious MCP OAuth client with a crafted client_name. If a victim user authorized the OAuth consent dialog and a second user subsequently revoked that access, a toast notification would render the injected script. Clicking the link would execute arbitrary JavaScript in the victim's authenticated n8n browser session, enabling credential and session token theft, workflow manipulation, or privilege escalation. This issue has been patched in versions 1.123.32, 2.17.4, and 2.18.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/n8n-io/n8n/security/advisories… | x_refsource_CONFIRM |
Impacted products
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CVE-2026-40321 (GCVE-0-2026-40321)
Vulnerability from cvelistv5 – Published: 2026-04-17 21:10 – Updated: 2026-04-22 03:55
VLAI
EPSS
VEX
Title
DotNetNuke.Core has stored cross-site-scripting (XSS) via SVG upload
Summary
DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Prior to version 10.2.2, a user could upload a specially crafted SVG file that could include scripts that can target both authenticated and unauthenticated DNN users. The impact is increased if the scripts are run by a power user. Version 10.2.2 patches the issue.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-87 - Improper Neutralization of Alternate XSS Syntax
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/dnnsoftware/Dnn.Platform/secur… | x_refsource_CONFIRM |
| https://github.com/dnnsoftware/Dnn.Platform/relea… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| dnnsoftware | Dnn.Platform |
Affected:
< 10.2.2
|
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CVE-2026-35534 (GCVE-0-2026-35534)
Vulnerability from cvelistv5 – Published: 2026-04-07 15:47 – Updated: 2026-04-09 16:19
VLAI
EPSS
VEX
Title
ChurchCRM has Stored XSS in PersonView.php via Facebook Field Attribute Injection
Summary
ChurchCRM is an open-source church management system. Prior to 7.1.0, a stored cross-site scripting vulnerability exists in PersonView.php due to incorrect use of sanitizeText() as an output sanitizer for HTML attribute context. The function only strips HTML tags, it does not escape quote characters allowing an attacker to break out of the href attribute and inject arbitrary JavaScript event handlers. Any authenticated user with the EditRecords role can store the payload in a person's Facebook field. The XSS fires against any user who views that person's profile page, including administrators, enabling session hijacking and full account takeover. This vulnerability is fixed in 7.1.0.
Severity
7.6 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/ChurchCRM/CRM/security/advisor… | x_refsource_CONFIRM |
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],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "CRM",
"vendor": "ChurchCRM",
"versions": [
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"status": "affected",
"version": "\u003c 7.1.0"
}
]
}
],
"descriptions": [
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"lang": "en",
"value": "ChurchCRM is an open-source church management system. Prior to 7.1.0, a stored cross-site scripting vulnerability exists in PersonView.php due to incorrect use of sanitizeText() as an output sanitizer for HTML attribute context. The function only strips HTML tags, it does not escape quote characters allowing an attacker to break out of the href attribute and inject arbitrary JavaScript event handlers. Any authenticated user with the EditRecords role can store the payload in a person\u0027s Facebook field. The XSS fires against any user who views that person\u0027s profile page, including administrators, enabling session hijacking and full account takeover. This vulnerability is fixed in 7.1.0."
}
],
"metrics": [
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"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.6,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N",
"version": "3.1"
}
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]
},
{
"descriptions": [
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"description": "CWE-87: Improper Neutralization of Alternate XSS Syntax",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-116",
"description": "CWE-116: Improper Encoding or Escaping of Output",
"lang": "en",
"type": "CWE"
}
]
}
],
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"x_refsource_CONFIRM"
],
"url": "https://github.com/ChurchCRM/CRM/security/advisories/GHSA-pqp6-54p2-m66f"
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],
"source": {
"advisory": "GHSA-pqp6-54p2-m66f",
"discovery": "UNKNOWN"
},
"title": "ChurchCRM has Stored XSS in PersonView.php via Facebook Field Attribute Injection"
}
},
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"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"cveId": "CVE-2026-35534",
"datePublished": "2026-04-07T15:47:44.342Z",
"dateReserved": "2026-04-03T02:15:39.281Z",
"dateUpdated": "2026-04-09T16:19:01.737Z",
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CVE-2026-34598 (GCVE-0-2026-34598)
Vulnerability from cvelistv5 – Published: 2026-04-02 17:37 – Updated: 2026-04-02 19:09
VLAI
EPSS
VEX
Title
YesWiki has Persistant Blind XSS at "/?BazaR&vue=consulter"
Summary
YesWiki is a wiki system written in PHP. Prior to version 4.6.0, a stored and blind XSS vulnerability exists in the form title field. A malicious attacker can inject JavaScript without any authentication via a form title that is saved in the backend database. When any user visits that injected page, the JavaScript payload gets executed. This issue has been patched in version 4.6.0.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/YesWiki/yeswiki/security/advis… | x_refsource_CONFIRM |
| https://github.com/YesWiki/yeswiki/releases/tag/v4.6.0 | x_refsource_MISC |
{
"containers": {
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"metrics": [
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"id": "CVE-2026-34598",
"options": [
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"Technical Impact": "partial"
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"role": "CISA Coordinator",
"timestamp": "2026-04-02T19:09:35.821184Z",
"version": "2.0.3"
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"dateUpdated": "2026-04-02T19:09:44.401Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "yeswiki",
"vendor": "YesWiki",
"versions": [
{
"status": "affected",
"version": "\u003c 4.6.0"
}
]
}
],
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{
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"value": "YesWiki is a wiki system written in PHP. Prior to version 4.6.0, a stored and blind XSS vulnerability exists in the form title field. A malicious attacker can inject JavaScript without any authentication via a form title that is saved in the backend database. When any user visits that injected page, the JavaScript payload gets executed. This issue has been patched in version 4.6.0."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "PASSIVE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "HIGH"
}
}
],
"problemTypes": [
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"descriptions": [
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"cweId": "CWE-79",
"description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
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]
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"descriptions": [
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"description": "CWE-87: Improper Neutralization of Alternate XSS Syntax",
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]
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],
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"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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},
"references": [
{
"name": "https://github.com/YesWiki/yeswiki/security/advisories/GHSA-37fq-47qj-6j5j",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/YesWiki/yeswiki/security/advisories/GHSA-37fq-47qj-6j5j"
},
{
"name": "https://github.com/YesWiki/yeswiki/releases/tag/v4.6.0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/YesWiki/yeswiki/releases/tag/v4.6.0"
}
],
"source": {
"advisory": "GHSA-37fq-47qj-6j5j",
"discovery": "UNKNOWN"
},
"title": "YesWiki has Persistant Blind XSS at \"/?BazaR\u0026vue=consulter\""
}
},
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"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"datePublished": "2026-04-02T17:37:37.386Z",
"dateReserved": "2026-03-30T17:15:52.499Z",
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Mitigation
Implementation
Resolve all input to absolute or canonical representations before processing.
Mitigation
Implementation
Carefully check each input parameter against a rigorous positive specification (allowlist) defining the specific characters and format allowed. All input should be neutralized, not just parameters that the user is supposed to specify, but all data in the request, including tag attributes, hidden fields, cookies, headers, the URL itself, and so forth. A common mistake that leads to continuing XSS vulnerabilities is to validate only fields that are expected to be redisplayed by the site. We often encounter data from the request that is reflected by the application server or the application that the development team did not anticipate. Also, a field that is not currently reflected may be used by a future developer. Therefore, validating ALL parts of the HTTP request is recommended.
Mitigation MIT-30.1
Implementation
Strategy: Output Encoding
- Use and specify an output encoding that can be handled by the downstream component that is reading the output. Common encodings include ISO-8859-1, UTF-7, and UTF-8. When an encoding is not specified, a downstream component may choose a different encoding, either by assuming a default encoding or automatically inferring which encoding is being used, which can be erroneous. When the encodings are inconsistent, the downstream component might treat some character or byte sequences as special, even if they are not special in the original encoding. Attackers might then be able to exploit this discrepancy and conduct injection attacks; they even might be able to bypass protection mechanisms that assume the original encoding is also being used by the downstream component.
- The problem of inconsistent output encodings often arises in web pages. If an encoding is not specified in an HTTP header, web browsers often guess about which encoding is being used. This can open up the browser to subtle XSS attacks.
Mitigation MIT-43
Implementation
With Struts, write all data from form beans with the bean's filter attribute set to true.
Mitigation MIT-31
Implementation
Strategy: Attack Surface Reduction
To help mitigate XSS attacks against the user's session cookie, set the session cookie to be HttpOnly. In browsers that support the HttpOnly feature (such as more recent versions of Internet Explorer and Firefox), this attribute can prevent the user's session cookie from being accessible to malicious client-side scripts that use document.cookie. This is not a complete solution, since HttpOnly is not supported by all browsers. More importantly, XmlHttpRequest and other powerful browser technologies provide read access to HTTP headers, including the Set-Cookie header in which the HttpOnly flag is set.
CAPEC-199: XSS Using Alternate Syntax
An adversary uses alternate forms of keywords or commands that result in the same action as the primary form but which may not be caught by filters. For example, many keywords are processed in a case insensitive manner. If the site's web filtering algorithm does not convert all tags into a consistent case before the comparison with forbidden keywords it is possible to bypass filters (e.g., incomplete black lists) by using an alternate case structure. For example, the "script" tag using the alternate forms of "Script" or "ScRiPt" may bypass filters where "script" is the only form tested. Other variants using different syntax representations are also possible as well as using pollution meta-characters or entities that are eventually ignored by the rendering engine. The attack can result in the execution of otherwise prohibited functionality.