How to fix 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.

Is Limesurvey 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. Attackers could inject scripts to steal sessions or perform actions as authenticated users. Proof-of-concept code is publicly available.

CVE-2020-36993

MEDIUM

2026-01-28 [email protected]

5.4

CVSS 3.1

CVSS Vector

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

Description

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.

Analysis

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 Context

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.

Affected Products

Vendor: Limesurvey. Product: Limesurvey. Component: Survey Menu.

Remediation

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.

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +0.1

CVSS: +27

POC: +20

CVE-2020-36993 vulnerability details – vuln.today

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CVE-2020-36993

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CVE-2020-36993

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