CVE-2026-91775

Published Sep 23, 2026 Modified Sep 23, 2026 CWE-79

Description

LimeSurvey fails to safely encode attacker-controlled content from a crafted .lss survey file when displaying import warnings, resulting in XSS in the administrative interface.

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Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

References

Other References

https://fluidattacks.com/advisories/alone https://github.com/LimeSurvey/LimeSurvey https://github.com/LimeSurvey/LimeSurvey/commit/c96db8093e852eb8b1a2ebbb32478d6fb34cb651 https://fluidattacks.com/advisories/alone

Frequently Asked Questions

What is CVE-2026-91775? +

LimeSurvey fails to safely encode attacker-controlled content from a crafted .lss survey file when displaying import warnings, resulting in XSS in the administrative interface.

How do I check if I'm vulnerable to CVE-2026-91775? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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