CVE-2026-59713

high

Description

Leantime contains an OIDC login CSRF vulnerability in the verifyState() method that unconditionally returns true without validating state parameters. Attackers can craft malicious callback URLs with attacker-controlled authorization codes to perform session fixation, logging victims in as the attacker.

References

https://www.vulncheck.com/advisories/leantime-oidc-login-csrf-via-unconditional-state-verification-stub

https://github.com/Leantime/leantime/issues/3535

https://github.com/Leantime/leantime/commit/9630eb7db682fb1b4e23cdabf3428d03ec6f5094

https://github.com/Leantime/leantime

Details

Source: Mitre, NVD

Published: 2026-07-06

Updated: 2026-07-07

Risk Information

CVSS v2

Base Score: 9.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N

Severity: High

CVSS v3

Base Score: 8.1

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

Severity: High

CVSS v4

Base Score: 8.6

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Severity: High

EPSS

EPSS: 0.00153