What is the CVSS score of CVE-2020-36993?

CVE-2020-36993 has a CVSS 3.1 base score of 5.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.1%.

Which versions of Limesurvey are affected by CVE-2020-36993?

Organizations using LimeSurvey 4.3.10 should be aware of moderate risk from CVE-2020-36993, a cross-site scripting vulnerability rated CVSS 5.4.. A patch is available.

Is there a public PoC exploit available for CVE-2020-36993?

Yes, a public proof-of-concept exploit is available for CVE-2020-36993. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2020-36993?

Within 30 days: Identify affected systems running the Survey Menu functionality of the administration panel. A and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Limesurvey CVE-2020-36993

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-01-28 disclosure@vulncheck.com

XSS Limesurvey

5.4

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.4 MEDIUM

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Feb 02, 2026 - 16:16 vuln.today

Public exploit code

Patch released

Feb 02, 2026 - 16:16 nvd

Patch available

CVE Published

Jan 28, 2026 - 13:15 nvd

MEDIUM 5.4

DescriptionCVE.org

LimeSurvey 4.3.10 contains a stored cross-site scripting vulnerability in the Survey Menu functionality of the administration panel. Attackers can inject malicious SVG scripts through the Surveymenu[title] and Surveymenu[parent_id] parameters to execute arbitrary JavaScript in administrative contexts.

AnalysisAI

LimeSurvey 4.3.10 contains a stored cross-site scripting vulnerability in the Survey Menu functionality of the administration panel. [CVSS 5.4 MEDIUM]

Technical ContextAI

Classified as CWE-79 (Cross-site Scripting (XSS)). Affects the Survey Menu component of Limesurvey. LimeSurvey 4.3.10 contains a stored cross-site scripting vulnerability in the Survey Menu functionality of the administration panel. Attackers can inject malicious SVG scripts through the Surveymenu[title] and Surveymenu[parent_id] parameters to execute arbitrary JavaScript in administrative contexts.

RemediationAI

A vendor patch is available — apply it immediately. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.

CVE-2020-36993 vulnerability details – vuln.today

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