CVE-2019-15941
OpenID Connect Issuer in LemonLDAP::NG 2.x through 2.0.5 may allow an attacker to bypass access control rules via a crafted OpenID Connect authorization request.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.46%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
OpenID Connect Issuer in LemonLDAP::NG 2.x through 2.0.5 may allow an attacker to bypass access control rules via a crafted OpenID Connect authorization request. To be vulnerable, there must exist an OIDC Relaying party within the LemonLDAP configuration with weaker access control rules than the target RP, and no filtering on redirection URIs.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.46% probability · 84th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-863
- Affected
- lemonldap-ng/lemonldap\ · debian/debian linux
- Source
- cve@mitre.org
EPSS 2.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/issues/1881Third Party Advisory
- https://projects.ow2.org/view/lemonldap-ng/lemonldap-ng-2-0-6-is-out/Third Party Advisory
- https://seclists.org/bugtraq/2019/Sep/46Mailing List, Third Party Advisory
- https://www.debian.org/security/2019/dsa-4533Third Party Advisory
- https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/issues/1881Third Party Advisory
- https://projects.ow2.org/view/lemonldap-ng/lemonldap-ng-2-0-6-is-out/Third Party Advisory
- https://seclists.org/bugtraq/2019/Sep/46Mailing List, Third Party Advisory
- https://www.debian.org/security/2019/dsa-4533Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.