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CVE-2026-55692— EmbedVideo Extension: Stored XSS via malformed src url with $wgEmbedVideoRequireConsent enabled

Quick assessment

Affected
StarCitizenWiki mediawiki-extensions-EmbedVideo
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

EmbedVideo 扩展是一个 MediaWiki 扩展，它添加了一个名为 的解析函数以及多种解析标签，用于嵌入来自各种视频分享服务的视频片段。 在 4.1.0 版本之前，当启用默认的 配置时， 文件会将通过 返回的 JSON 数据直接放入 属性中，而未对单引号进行安全转义。 攻击者可通过控制 的标识符，或提供被受影响的服务验证器所接受的 Wistia 或 SharePoint URL，使 函数的输出能够终止该 HTML 属性，并借此向生成的 元素中注入事件处理器属性（如 、 等）。 任何能够编辑维基页面的用户均

CVSS 7.5 · High EPSS 0.49% · P43

Affected Version Matrix 1

VendorProduct Version RangeStatus
StarCitizenWiki mediawiki-extensions-EmbedVideo < 4.1.0 affected
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I. Basic Information for CVE-2026-55692

Vulnerability Information
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Vulnerability Title
EmbedVideo Extension: Stored XSS via malformed src url with $wgEmbedVideoRequireConsent enabled
Source: CVE Program / CVE List V5
Vulnerability Description
The EmbedVideo Extension is a MediaWiki extension which adds a parser function called #ev and various parser tags for embedding video clips from various video sharing services. Prior to 4.1.0, with the default $wgEmbedVideoRequireConsent configuration enabled, includes/EmbedService/EmbedHtmlFormatter.php places JSON returned through includes/EmbedService/AbstractEmbedService.php into the data-mw-iframeconfig attribute without safely escaping single quotes. Attacker-controlled archiveorg identifiers and wistia or sharepoint URLs accepted by the affected service validators can cause getUrl() output to terminate the attribute and inject event-handler attributes into the generated figure element. A user able to edit a wiki page can store JavaScript that executes in the wiki origin when visitors render the page. This issue is fixed in version 4.1.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
StarCitizenWiki mediawiki-extensions-EmbedVideo < 4.1.0 -

II. Public POCs for CVE-2026-55692

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III. Intelligence Information for CVE-2026-55692

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Patches & Fixes for CVE-2026-55692 (1)

Vendor Advisories for CVE-2026-55692 (1)

Vendor Pages for CVE-2026-55692 (1)

Same Patch Batch · StarCitizenWiki · 2026-09-15 · 3 CVEs total

CVE-2026-55691 8.6 HIGH EmbedVideo Extension : Stored XSS via unsanitized class passed to template
CVE-2026-55690 7.5 HIGH EmbedVideo Extension: Stored XSS via unsanitized service name in exception text

IV. Related Vulnerabilities

Same product: mediawiki-extensions-EmbedVideo
Same vendor: StarCitizenWiki
Same weakness: CWE-79