Vulnerability · Published Aug 26, 2026 · Assigned by Fluid Attacks
CVE-2026-16809LimeSurvey Community Edition 7.0.5 - Stored XSS in quota message rendering
High 7.2
In plain English
A high-severity cross-site scripting in LimeSurvey from LimeSurvey. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities).
Severity (CVSS 4.0)7.2High
Exploit odds (30 days)0.4%top 64.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
LimeSurvey Community Edition 7.0.5 contains a stored cross-site scripting vulnerability in the survey quota creation workflow. An authenticated low-privileged user who can create and manage their own survey can store malicious JavaScript in a quota message. This issue affects LimeSurvey: 7.0.5.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| LimeSurvey | LimeSurvey | 7.0.5 |
Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N
References
- https://fluidattacks.com/es/advisories/wellerman third-party-advisory
- https://github.com/LimeSurvey/LimeSurvey product