How severe is CVE-2025-11537?

CVE-2025-11537 has a CVSS 3.x base score of 5.0, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-11537 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-11537?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-11537 have an EU (EUVD) identifier?

Yes. CVE-2025-11537 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-207355.

When was CVE-2025-11537 published?

CVE-2025-11537 was published on 2026-02-10 and last updated on 2026-06-17.

CVE-2025-11537

CVE-2025-11537 is a medium-severity vulnerability with a CVSS 3.x base score of 5.0. 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-117.

Key facts

Severity: Medium (CVSS 3.x base score 5.0)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-207355
Weakness: CWE-117
Published: 2026-02-10
Last modified: 2026-06-17

Description

A flaw was found in Keycloak. When the logging format is configured to a verbose, user-supplied pattern (such as the pre-defined 'long' pattern), sensitive headers including Authorization and Cookie are disclosed to the logs in cleartext. An attacker with read access to the log files can extract these credentials (e.g., bearer tokens, session cookies) and use them to impersonate users, leading to a full account compromise.

Frequently asked questions

What is CVE-2025-11537?: A flaw was found in Keycloak. When the logging format is configured to a verbose, user-supplied pattern (such as the pre-defined 'long' pattern), sensitive headers including Authorization and Cookie are disclosed to the logs in cleartext. An attacker with read access to the log files can extract these credentials (e.g., bearer tokens, session cookies) and use them to impersonate users, leading to a full account compromise.
How severe is CVE-2025-11537?: CVE-2025-11537 has a CVSS 3.x base score of 5.0, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-11537 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-11537?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-11537 have an EU (EUVD) identifier?: Yes. CVE-2025-11537 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-207355.
When was CVE-2025-11537 published?: CVE-2025-11537 was published on 2026-02-10 and last updated on 2026-06-17.

References

Other CWE-117 (Improper Output Neutralization for Logs) vulnerabilities

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