CVE-2013-4294

The (1) mamcache and (2) KVS token backends in OpenStack Identity (Keystone) Folsom 2012.2.x and Grizzly before 2013.1.4 do not properly compare the PKI token revocation list with PKI tokens, which allow remote attackers to bypass intended access restrictions via a revoked PKI token.

Published: 2013-09-23 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-4294 is rated Moderate Risk (50/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.34%). EPSS rose +1.54% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2013-4294

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.80% 2.34% +1.54%
2 2025-05-30 0.92% 0.80% -0.12%
3 2025-03-30 — 0.92% —

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-4294

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2013-4294

GitHub Security Advisory for CVE-2013-4294

GHSA-5qpp-v56f-mqfm · Severity: medium · Ecosystem: pip — OpenStack Identity (Keystone) allows remote attackers to bypass intended access restrictions via revoked PKI token

OS Trackers for CVE-2013-4294

vendor priority summary link
debian not yet assigned CVE-2013-4294 not yet assigned priority: Debian including 1 source packages (keystone), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2013-4294
redhat medium — https://access.redhat.com/security/cve/CVE-2013-4294
ubuntu medium CVE-2013-4294 medium priority: Ubuntu including 1 source packages (keystone), 6 status rows across 6 suites (lucid, precise, quantal, raring, saucy, upstream): released 3, not-affected 2, DNE 1. https://ubuntu.com/security/CVE-2013-4294

Affected software / configurations for CVE-2013-4294

Vendor Product Version Raw CPE
openstack keystone 2012.2 cpe:2.3:a:openstack:keystone:2012.2:*:*:*:*:*:*:*
openstack keystone 2012.2.1 cpe:2.3:a:openstack:keystone:2012.2.1:*:*:*:*:*:*:*
openstack keystone 2012.2.2 cpe:2.3:a:openstack:keystone:2012.2.2:*:*:*:*:*:*:*
openstack keystone 2012.2.3 cpe:2.3:a:openstack:keystone:2012.2.3:*:*:*:*:*:*:*
openstack keystone 2012.2.4 cpe:2.3:a:openstack:keystone:2012.2.4:*:*:*:*:*:*:*
openstack keystone 2013.1 cpe:2.3:a:openstack:keystone:2013.1:*:*:*:*:*:*:*
openstack keystone 2013.1.1 cpe:2.3:a:openstack:keystone:2013.1.1:*:*:*:*:*:*:*
openstack keystone 2013.1.2 cpe:2.3:a:openstack:keystone:2013.1.2:*:*:*:*:*:*:*
openstack keystone 2013.1.3 cpe:2.3:a:openstack:keystone:2013.1.3:*:*:*:*:*:*:*

References for CVE-2013-4294

cvelogic Threat Intelligence