CVE-2026-63360

Received Received - Intake

Authenticated Reflected XSS in LimeSurvey Community Edition

Publication date: 2026-08-26

Last updated on: 2026-08-26

Assigner: Fluid Attacks

Description

LimeSurvey Community Edition 7.0.5+260623 contains an authenticated reflected Cross-Site Scripting vulnerability in the user activation confirmation endpoint. The action query parameter is copied into the response and inserted into a hidden input attribute without HTML attribute encoding. This issue affects LimeSurvey: 7.0.5.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-26

Last Modified

2026-08-26

Generated

2026-08-27

AI Q&A

2026-08-27

EPSS Evaluated

N/A

NVD

CVE-2026-63360

EUVD

EUVD-2026-66773

Affected Vendors & Products

Vendor	Product	Version / Range
limesurvey	community_edition	7.0.5

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-79	The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

Executive Summary

LimeSurvey Community Edition 7.0.5+260623 has an authenticated reflected Cross-Site Scripting (XSS) vulnerability. This occurs in the user activation confirmation endpoint where the action query parameter is reflected in the response without proper HTML encoding, allowing script injection via a hidden input attribute.

Detection Guidance

To detect this vulnerability, inspect HTTP responses for the 'action' query parameter reflected in hidden input attributes without proper encoding. Use tools like Burp Suite or OWASP ZAP to intercept and analyze responses from LimeSurvey endpoints. Check for URLs containing 'action=' followed by user-supplied input in the response body.

Impact Analysis

An attacker could exploit this to execute malicious scripts in a victim's browser when they interact with the vulnerable endpoint. This may lead to session hijacking, data theft, or unauthorized actions on behalf of the user.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR's integrity and confidentiality principles or HIPAA's security requirements for protected health information. Organizations may face compliance penalties if exploited.

Mitigation Strategies

Upgrade LimeSurvey to a patched version beyond 7.0.5. If upgrading is not immediately possible, apply input validation to sanitize the 'action' parameter and ensure proper HTML attribute encoding in responses. Restrict access to the user activation endpoint to trusted users only.

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