CVE-2015-2091

NONECVSS 0.0

0.0

The authentication hook (mgs_hook_authz) in mod-gnutls 0.5.10 and earlier does not validate client certificates when "GnuTLSClientVerify require" is set, which allows remote attackers to spoof clients via a crafted certificate.

CVSS v3: —
EG Score: 0.0(none)
EPSS: 72.7%
KEV: Not listed

Published

March 13, 2015

Last Modified

May 6, 2026

References (8)

cve@mitrehttp://issues.outoforder.cc/view.php?id=93
cve@mitrehttp://www.debian.org/security/2015/dsa-3177
cve@mitrehttps://bugs.debian.org/cgi-bin/bugreport.cgi?bug=578663
cve@mitrehttps://security.gentoo.org/glsa/201709-04
af854a3a-2127-422b-91ae-364da2661108http://issues.outoforder.cc/view.php?id=93
af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2015/dsa-3177
af854a3a-2127-422b-91ae-364da2661108https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=578663
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/201709-04

Data Freshness Timeline

(refreshed 8× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:14 UTCEPSS rescore
2026-06-07 15:22 UTCEPSS rescore
2026-06-06 13:45 UTCEPSS rescore
2026-06-05 22:44 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-04 13:09 UTCEPSS rescore
2026-06-02 20:10 UTCEPSS rescore
2026-06-02 20:10 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 00:14 UTCEPSS rescore
2026-05-29 13:41 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-28 13:10 UTCEG score recompute

Frequently asked(4)

What is CVE-2015-2091?

CVE-2015-2091 is a none vulnerability published on March 13, 2015. The authentication hook (mgshookauthz) in mod-gnutls 0.5.10 and earlier does not validate client certificates when "GnuTLSClientVerify require" is set, which allows remote attackers to spoof clients via a crafted certificate.

When was CVE-2015-2091 disclosed?

CVE-2015-2091 was first published in the National Vulnerability Database on March 13, 2015, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2015-2091 actively exploited?

CVE-2015-2091 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 72.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2015-2091?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-2091, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2015-2091

Explore →

Is Your Infrastructure Affected by CVE-2015-2091?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2015-2091

📅 Published

🔄 Last Modified

🔗 References (8)