Unrated

Stored XSS in StarCitizenWiki Embed Video extension

IdentifiersCVE-2026-55691CWE-79

CVE-2026-55691 is a stored cross-site scripting vulnerability in the StarCitizenWiki Embed Video extension. According to the provided advisory, the issue is caused by an unsanitized user-supplied class value being inserted into generated HTML. This allows attacker-controlled markup to be persisted and later rendered in application pages, where it can execute in victims' browsers when the malicious content is viewed.

For your environment

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows an attacker to inject arbitrary HTML into the DOM and execute JavaScript in the browsers of users who view affected pages. Because the issue is stored XSS, the payload can persist server-side and affect multiple subsequent viewers of the malicious content. Likely consequences include session theft, arbitrary actions in the victim's browser context, content manipulation, phishing, and access to sensitive data available to the web application session.

Remediation

Patch, then assume compromise.

Upgrade Packagist/starcitizenwiki/embedvideo to version 4.1.0 or later, which is identified in the advisory as containing the fix.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

ACTIVITY FEED

Recent activity

No public activity tracked yet. Mallory keeps watching.

0 SOURCESView more in app

No public activity observed for this vulnerability.

What this page doesn’t show

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Exposure mapping

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Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity