CVE-2021-35473

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-11-10 · updated 2026-06-17
Weakness: CWE-613

Description

An issue was discovered in LemonLDAP::NG before 2.0.12. There is a missing expiration check in the OAuth2.0 handler, i.e., it does not verify access token validity. An attacker can use a expired access token from an OIDC client to access the OAuth2 handler The earliest affected version is 2.0.4.

Affected products

Lemonldap-Ng: before 2.0.12 — fixed in 2.0.12

How to fix

Upgrade to a fixed version: Lemonldap-Ng 2.0.12. Check the vendor advisory for mitigations.

References

https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/issues/2549
https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/tags

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