CVE-2026-115640
LimeSurvey Community Edition 7.7.0 - Stored XSS in Central Participants blocklist control
LimeSurvey Community Edition 7.7.0 contains a stored cross-site scripting vulnerability in the Central Participants Database blocklist control. An authenticated user with only global participantpanel:import permission can import a CSV participant_id containing HTML. The import flow persists that value without model validation. When a CPDB editor opens the participant list, LimeSurvey derives ButtonGroupWidget id and name attributes from participant_id and inserts them without HTML encoding, causing attacker-controlled markup to execute in the victim's authenticated LimeSurvey origin. Exploitation can access session-exposed data and issue same-origin requests with the victim's effective permissions.
Fixes and workarounds
Fix
Upgrade to LimeSurvey Community Edition 7.9.0 or later; the vendor patch validates newly imported participant IDs and encodes ButtonGroupWidget attributes.
Source: CNA: Fluid AttacksWorkaround
Restrict CPDB Import and Update permissions and remove suspicious participant IDs until upgrade completion.
Source: CNA: Fluid AttacksFix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: Fluid AttacksAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| LimeSurvey Community Edition LimeSurvey Platforms: Windows, MacOS, Linux |
≥ 3.0.0; ≤ 7.7.0 (affected, semver)
Other versions: unaffected |
CNA: Fluid Attacks |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 7.4 high |
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N | CNA: Fluid Attacks |
| 4.0 / 7.4 high |
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD: [email protected] |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://fluidattacks.com/es/advisories/angelCNA: Fluid Attacks · third-party-advisory
- https://github.com/LimeSurvey/LimeSurvey/CNA: Fluid Attacks · product
- https://github.com/LimeSurvey/LimeSurvey/commit/4cd281828422abf94468052016eba8897d5ec9aaCNA: Fluid Attacks · patch
- https://github.com/LimeSurvey/LimeSurvey/releases/tag/7.9.0+261029CNA: Fluid Attacks · release-notes
- https://fluidattacks.com/es/advisories/angel[email protected]
- https://github.com/LimeSurvey/LimeSurvey/[email protected]
- https://github.com/LimeSurvey/LimeSurvey/commit/4cd281828422abf94468052016eba8897d5ec9aa[email protected]
- https://github.com/LimeSurvey/LimeSurvey/releases/tag/7.9.0+261029[email protected]
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