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LimeSurvey CVE-2026-65931

| EUVDEUVD-2026-67164 MEDIUM
Missing Authorization (CWE-862)
2026-08-27 Fluid Attacks GHSA-qjpx-79gc-wjgv
PHP Authentication Bypass Limesurvey
5.1
CVSS 4.0 · Vendor: Fluid Attacks
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Severity by source

Vendor (Fluid Attacks) PRIMARY
5.1 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/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
vuln.today AI
4.3 MEDIUM

Network-accessible admin endpoint; attacker needs only a limited settings:read account (PR:L), not full admin; integrity-only impact with no confidentiality or availability effect.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (Fluid Attacks).

CVSS VectorVendor: Fluid Attacks

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
X

Lifecycle Timeline

1
Analysis Generated
Aug 27, 2026 - 21:05 vuln.today

DescriptionCVE.org

LimeSurvey Community Edition 7.0.5 contains an authenticated improper authorization vulnerability in the survey menu entry creation endpoint.

An authenticated user with only the global settings:read permission can directly invoke POST /index.php/admin/menuentries/sa/create and create new survey menu entries without the expected settings:update privilege. The endpoint also allows the attacker to submit menu IDs that the normal interface and intended update workflow restrict for non-superadministrators, enabling unauthorized changes to administrative navigation records.

This issue affects LimeSurvey: 7.0.5.

AnalysisAI

Improper authorization in LimeSurvey Community Edition 7.0.5 allows authenticated users holding only the settings:read permission to invoke the survey menu entry creation endpoint (POST /index.php/admin/menuentries/sa/create) without the required settings:update privilege, constituting vertical privilege escalation within the application's RBAC model. The same endpoint permits submission of menu IDs that the normal interface restricts to superadministrators, enabling unauthorized manipulation of administrative navigation records. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Exploitation requires an authenticated LimeSurvey account with at least the `settings:read` global permission assigned; unauthenticated access is not sufficient, and the vulnerability does not affect unprivileged survey respondent accounts. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:H/UI:N) reflects network accessibility with no attack complexity, but requires a high-privilege authenticated session - the vendor's own scoring treats `settings:read` as a high-privilege permission, likely because admin panel access itself implies an elevated account. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upstream fix availability should be verified directly against the LimeSurvey GitHub repository (https://github.com/LimeSurvey/LimeSurvey) and the Fluid Attacks advisory (https://fluidattacks.com/advisories/coda); no specific patched version number is confirmed from the available input data, so organizations should monitor for a release superseding 7.0.5 and apply it promptly. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-65931 vulnerability details – vuln.today
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