AIKIDO-2026-16669
cesanta.mongoose is vulnerable to Cross-Site Scripting (XSS)
54
Medium Risk
This Affects:
cesanta.mongooseTL;DR
When directory listing is enabled, filenames are placed into the listing link text without HTML-entity encoding while only the link target is URL-encoded. A file whose name contains markup causes that markup to execute when any user views the listing. This stored cross-site scripting runs in the origin of the Mongoose server. The fix HTML-escapes filenames before rendering them.
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 and untrusted input can create filenames in the served directory.
Background info
cesanta.mongoose is vulnerable to Cross-Site Scripting (XSS) in versions 7.0 - 7.21.
How to fix this
Upgrade the cesanta.mongoose library to the patch version.
Links
GitHub Release
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SOC 2Compliant
ISO 27001Compliant