AIKIDO-2026-524114
cesanta.mongoose is vulnerable to Cross-Site Scripting (XSS)
54
Medium Risk
This Affects:
cesanta.mongooseTL;DR
When directory listing is enabled, the request path is URL-decoded and written into the listing page title and heading without HTML-entity encoding. A crafted link whose path contains markup causes that markup to execute in the browser of a user who follows it. This reflected cross-site scripting runs in the origin of the Mongoose server and needs no write access. The fix HTML-escapes the decoded path before rendering.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you serve directory listings with MG_ENABLE_DIRLIST enabled.
Background info
cesanta.mongoose is vulnerable to Cross-Site Scripting (XSS) in versions 7.0.0 - 7.21.0.
How to fix this
Upgrade the cesanta.mongoose library to the patch version.
Links
GitHub Release
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