CVE-2026-66414: Leantime Open Redirect in Login Controller via redirectUrl Parameter

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-30 · updated 2026-07-31
Weakness: CWE-601

Description

Leantime 3.6.2 contains an open redirect vulnerability in the Login controller that allows unauthenticated attackers to redirect authenticated users to arbitrary external sites by manipulating the redirectUrl POST parameter. Attackers can craft a malicious login URL with a tampered redirectUrl value that bypasses FILTER_SANITIZE_URL validation to redirect victims to attacker-controlled sites for phishing or credential theft.

Affected products

Leantime: through 3.6.2

References

https://github.com/Leantime/leantime
https://github.com/Leantime/leantime/pull/3658
https://github.com/javokhir-sec/CVE-PoC-Hub/security/advisories/GHSA-wprg-q8m6-jhp9
https://www.vulncheck.com/advisories/leantime-open-redirect-in-login-controller-via-redirecturl-parameter
https://github.com/Leantime/leantime/pull/3658

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