CVE-2025-23013
CVE-2025-23013 is a high-severity vulnerability with a CVSS 4.0 base score of 7.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-394.
Key facts
- Severity: High (CVSS 4.0 base score 7.3)
- EPSS exploit prediction: 0% (32nd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-3074
- Weakness: CWE-394
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2025-23013?
- 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.
- How severe is CVE-2025-23013?
- CVE-2025-23013 has a CVSS 4.0 base score of 7.3, rated high severity.
- Is CVE-2025-23013 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2025-23013?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2025-23013 have an EU (EUVD) identifier?
- Yes. CVE-2025-23013 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-3074.
- When was CVE-2025-23013 published?
- CVE-2025-23013 was published on 2025-01-15 and last updated on 2026-06-17.
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
Other CWE-394 vulnerabilities
- CVE-2025-12516 — Critical (CVSS 9.8): Lack of Graceful Error Handling - HTTP 5xx ErrorThis issue affects BLU-IC2: through 1.19.5; BLU-IC4: through 1.19.5 .
- CVE-2025-12515 — Critical (CVSS 9.8): Systemic Internal Server Errors - HTTP 500 ResponseThis issue affects BLU-IC2: through 1.19.5; BLU-IC4: through 1.19.5 .
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