CVE-2025-23013
In Yubico pam-u2f before 1.3.1, local privilege escalation can sometimes occur.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.40%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In Yubico pam-u2f before 1.3.1, local privilege escalation can sometimes occur. This product implements a Pluggable Authentication Module (PAM) that can be deployed to support authentication using a YubiKey or other FIDO compliant authenticators on macOS or Linux. This software package has an issue that allows for an authentication bypass in some configurations. An attacker would require the ability to access the system as an unprivileged user. Depending on the configuration, the attacker may also need to know the user's password.
- CVSS 4.0
- 7.3 HIGHCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.40% probability · 35th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-394
- Source
- cve@mitre.org
EPSS 0.4% since 26 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://www.yubico.com/support/security-advisories/ysa-2025-01/
- http://www.openwall.com/lists/oss-security/2025/01/15/1
- http://www.openwall.com/lists/oss-security/2025/01/16/2
- http://www.openwall.com/lists/oss-security/2025/01/16/3
- http://www.openwall.com/lists/oss-security/2025/01/16/4
- http://www.openwall.com/lists/oss-security/2025/01/16/5
- https://lists.debian.org/debian-lts-announce/2025/02/msg00001.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.