CVE-2026-55692 is a high-severity cross-site scripting (XSS) vulnerability in starcitizenwiki/embedvideo (composer), affecting versions <= 4.0.0. It is fixed in 4.1.0.
Summary With $wgEmbedVideoRequireConsent enabled (the default), the urls for videos are stored in a json-ified data attributedata-mw-iframeconfig. When given a malformed url or id, the data-mw-iframeconfig attribute can be escaped via single quotes, allowing for html/javascript injection. Details The sprintf here adds the iframe config encoded as JSON here. When given a malicious url or id with a single quote, the $this->getUrl() call returns an unescaped payload that terminates the data-mw-iframeconfig attribute and allows for injecting attributes, including handlers, into the figure element. The id regex for the archiveorg service and the url regexes for the wistia and sharepoint services allow for single quotes to be introduced. PoC A couple of examples across services Impact Under the default $wgEmbedVideoRequireConsent = true configuration, any user able to edit a page can inject arbitrary JavaScript into an HTML event handler attribute (e.g. onfocus) via parameter. It requires no interaction (autofires via autofocus) and executes in the wiki origin for every visitor to the page.
Untrusted input is rendered as active markup in a victim's browser, which can run script in their session. Typical impact: session or credential theft, and actions taken as the user.
CVE-2026-55692 has a CVSS score of 7.5 (High). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment.
A fixed version is available (4.1.0). Upgrading removes the vulnerable code path.
composer
starcitizenwiki/embedvideo (<= 4.0.0)starcitizenwiki/embedvideo → 4.1.0 (composer)Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter instead of chasing every advisory.
Kodem's runtime-powered SCA identifies whether CVE-2026-55692 is reachable in your applications. Explore open-source security for your team.
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Upgrade starcitizenwiki/embedvideo to 4.1.0 or later to resolve this vulnerability.
Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
CVE-2026-55692 is a high-severity cross-site scripting (XSS) vulnerability in starcitizenwiki/embedvideo (composer), affecting versions <= 4.0.0. It is fixed in 4.1.0. Untrusted input is rendered as active markup in a victim's browser, which can run script in their session.
CVE-2026-55692 has a CVSS score of 7.5 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
starcitizenwiki/embedvideo (composer) versions <= 4.0.0 is affected.
Yes. CVE-2026-55692 is fixed in 4.1.0. Upgrade to this version or later.
Whether CVE-2026-55692 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
Upgrade starcitizenwiki/embedvideo to 4.1.0 or later.