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CVE-2015-5189

15
FAUCET Score

CVE-2015-5189 describes a race condition in pcsd within PCS 0.9.139 and earlier, affecting the Pacemaker/Corosync Configuration System. This vulnerability allows remote authenticated users to gain privileges due to a global variable used for username validation, which can be exploited by sending a command after another user has authenticated. With a CVSS score of 4.9, it has a network attack vector, medium attack complexity, and potential for partial confidentiality and integrity impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.9.139CPE matchmatch criteria
cpe:2.3:a:pacemaker\/corosync_configuration_system_project:pacemaker\/corosync_configuration_system:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.9MEDIUM

AV:N/AC:M/Au:S/C:P/I:P/A:N

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
SINGLE
Exploitability Score
6.8
Impact Score
4.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.98%
Probability of exploitation in next 30 days
EPSS Percentile
58.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0098 is in the 52nd percentile among its peer group of 1,428 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: pcs-0:0.9.139-9.el6_7.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: pcs-0:0.9.137-13.el7_1.4
View patch

Vendor Advisories (1)

redhatCVE-2015-5189Moderate

pcs: Incorrect authorization when using pcs web UI

Sep 1, 2015

References

rhn.redhat.com / errata/RHSA-2015-1700.html
bugzilla.redhat.com / show_bug.cgi