CVE-2026-55691High· 8.6▾ MidnightPoC availableThe 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, EmbedHtmlFormatter::toHtml in includes/Embed…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 47.3 · likelihood 0.1 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 19.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
Exploit / PoC code exists
0.3%
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, EmbedHtmlFormatter::toHtml in includes/EmbedService/EmbedHtmlFormatter.php passes the user-supplied class value directly to sprintf while constructing a figure element. A quote in the class value can terminate the class attribute and inject arbitrary HTML attributes or markup into the rendered page. A user able to edit a wiki page can store JavaScript that executes for visitors who render the affected content. This issue is fixed in version 4.1.0.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
starcitizenwiki/embedvideo <= 4.0.0Patched in:
starcitizenwiki/embedvideo 4.1.0Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-55692High· 7.5The 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
CVE-2026-55690High· 7.5The 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
CVE-2026-57440High· 7.5The 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
CVE-2018-19953Medium· 6.1If exploited, this cross-site scripting vulnerability could allow remote attackers to inject malicious code
CVE-2018-19943High· 8.0If exploited, this cross-site scripting vulnerability could allow remote attackers to inject malicious code
CVE-2021-41184Medium· 6.5jQuery-UI is the official jQuery user interface library