CVE-2025-41074

HIGH

LimeSurvey 6.13.0 - Denial of Service via Infinite Redirect Loop in /optout Endpoint

Title source: llm

Description

Vulnerability in LimeSurvey 6.13.0 in the endpoint /optout that causes infinite HTTP redirects when accessed directly. This behavior can be exploited to generate a Denegation of Service (DoS attack), by exhausting server or client resources. The system is unable to break the redirect loop, which can cause service degradation or browser instability.

References (1)

Core 1

Core References

Third Party Advisory

https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-limesurvey-0

Scores

CVSS v3 7.5

EPSS 0.0026

EPSS Percentile 17.4%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-835

Status published

Products (1)

limesurvey/limesurvey 6.13.0

Published Nov 20, 2025

Tracked Since Feb 18, 2026