LimeSurvey Community Edition 7.7.0 - Stored XSS in Central Participants blocklist control
Summary
| CVE | CVE-2026-115640 |
|---|---|
| State | PUBLISHED |
| Assigner | Fluid Attacks |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-11-10 05:17:47 UTC |
| Updated | 2026-11-10 20:18:04 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v4.0 7.4 HIGH from [email protected]
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
EPSS: 0.002780000 probability, percentile 0.204150000 (date 2026-11-10)
Problem Types: CWE-79 | CWE-79 CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 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/C... |
| 4.0 | CNA | CVSS | 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 |
CVSS v4.0 Breakdown
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
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | LimeSurvey | LimeSurvey Community Edition | affected 3.0.0 7.7.0 semver | Windows, MacOS, Linux |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/LimeSurvey/LimeSurvey/commit/4cd281828422abf94468052016eba889... | [email protected] | github.com | |
| fluidattacks.com/es/advisories/angel | [email protected] | fluidattacks.com | |
| github.com/LimeSurvey/LimeSurvey/releases/tag/7.9.0+261029 | [email protected] | github.com | |
| github.com/LimeSurvey/LimeSurvey | [email protected] | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Fluid Attacks' AI SAST Scanner (en)
CNA: Miguel Gómez (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-10-22T05:00:00.000Z | Vulnerability discovered |
| CNA | 2026-10-23T16:46:00.000Z | Vendor contacted |
| CNA | 2026-10-28T18:27:00.000Z | Vendor replied |
| CNA | 2026-10-29T13:37:00.000Z | Vulnerability patched |
| CNA | 2026-11-10T04:10:00.000Z | Public disclosure |
Solutions
CNA: Upgrade to LimeSurvey Community Edition 7.9.0 or later; the vendor patch validates newly imported participant IDs and encodes ButtonGroupWidget attributes.
Workarounds
CNA: Restrict CPDB Import and Update permissions and remove suspicious participant IDs until upgrade completion.