CVE-2025-41075: Vulnerability in LimeSurvey 6.13.0 in the endpoint /optin that causes infinite HTTP redirects when accessed directly…
CVE-2025-41075 · Severity: high · CVSS 7.5 · Published 2025-11-20
Vulnerability in LimeSurvey 6.13.0 in the endpoint /optin 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.
No. Junglewise Threat Intelligence has no report of CVE-2025-41075 being exploited in the wild.
How severe is CVE-2025-41075?
High severity, with a CVSS score of 7.5, published 20 November 2025.
Which products and versions are affected?
LimeSurvey. The advisory does not name versions.
Is there a fix for CVE-2025-41075?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2025-41075?
Check whether you run LimeSurvey. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.