Security readout for executives and security teams
Plain-English summary
CVE-2020-36993 is a stored cross-site scripting issue in LimeSurvey’s administration Survey Menu. A user with some administrative access could save malicious script content that later runs in another admin’s browser. This can expose administrative data or allow unauthorized changes within LimeSurvey, but it requires privileges and user interaction.
Executive priority
Treat as a scheduled remediation item unless LimeSurvey administration is internet-accessible or broadly delegated. Prioritize faster if the platform handles sensitive survey data, supports external administrators, or lacks strong admin access controls.
Technical view
LimeSurvey 4.3.10 and earlier are reported vulnerable to stored XSS in Survey Menu handling. The issue is tied to Surveymenu[title] and Surveymenu[parent_id] input, allowing SVG script injection that executes JavaScript in an administrative context. CVSS 3.1 is 5.4: network reachable, low complexity, low privileges required, and user interaction required.
Likely exposure
Exposure is most relevant for organizations running LimeSurvey version 4.3.10 or earlier, especially internet-accessible administration portals or environments with multiple delegated survey administrators. Public exploit information exists, but the source bundle does not show CISA KEV listing or active exploitation.
Exploitation context
An attacker needs authenticated access with enough rights to modify Survey Menu data, and a victim administrator must later view the affected administrative page. Successful exploitation could execute JavaScript in the victim’s session, risking data exposure or unauthorized administrative actions inside LimeSurvey.
Researcher notes
The bundle includes a patch commit, VulnCheck advisory, CVE references, and Exploit-DB entry. Do not infer active exploitation from exploit publication alone. The affected-version metadata is inconsistent, so validate against LimeSurvey release history and vendor guidance before scoping broadly.
Mitigation direction
- Identify all LimeSurvey instances and their versions.
- Upgrade affected LimeSurvey deployments using vendor guidance or the referenced patch lineage.
- Restrict access to LimeSurvey administration interfaces to trusted networks and users.
- Review Survey Menu entries for unexpected script-like or SVG content.
- Limit delegated admin permissions where Survey Menu modification is unnecessary.
Validation and detection
- Confirm whether any instance runs LimeSurvey 4.3.10 or earlier.
- Verify the vendor fix is present in the deployed codebase or release.
- Review admin audit logs for recent Survey Menu changes.
- Check existing Survey Menu values for suspicious embedded markup.
- Confirm administrative access controls are enforced and documented.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2020-36993 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N2.32.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-48762CVE reference · exploit
- LimeSurvey Official WebsiteCVE reference · product
- LimeSurvey Patch CommitCVE reference · issue-tracking, patch
- VulnCheck Advisory: LimeSurvey <= 4.3.10 - 'Survey Menu' Persistent Cross-Site ScriptingCVE reference · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.