CVE-2020-36993 LimeSurvey <= 4.3.10 - 'Survey Menu' Persistent Cross-Site Scripting

What is CVE-2020-36993?

CVE-2020-36993 is a medium-severity cross-site scripting vulnerability in Limesurvey Limesurvey, published on 28 Jan 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official 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.

Weakness: CWE-79

Which versions are affected by CVE-2020-36993?

It affects 1 product.

Products include Limesurvey Limesurvey.

How do I fix CVE-2020-36993?

No fix has been published for CVE-2020-36993 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2020-36993 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-36993 exists.

Other vulnerabilities in Limesurvey Limesurvey

• CVE-2025-56422 Deserialization in n/a Critical 9.8
• CVE-2022-48008 File upload in n/a Critical 9.8
• CVE-2019-25019 SQL injection in n/a Critical 9.8
• CVE-2020-11455 Path traversal in n/a Critical 9.8
• CVE-2019-16184 Code injection in n/a Critical 9.8

All Limesurvey Limesurvey vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-7562-jj5h-pjxj.