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Fencer Vulns
medium 6.1

CVE-2017-2661 json

ClusterLabs pcs before version 0.9.157 is vulnerable to a cross-site scripting vulnerability due to improper validation of Node name field…

published 2018-03-12 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-11809

cvss
6.1
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits
0
none known

Summary

ClusterLabs pcs before version 0.9.157 is vulnerable to a cross-site scripting vulnerability due to improper validation of Node name field when creating new cluster or adding existing cluster.

Patch / fix

  • clusterlabs pcs 0.9.157
  • pcs Debian 14, Debian 13, Debian 12 0.9.155+dfsg-2

debian advisories DEBIAN-CVE-2017-2661

  • pcs Ubuntu Pro 16.04 LTS 0.9.149-1ubuntu1.1+esm1

ubuntu advisories UBUNTU-CVE-2017-2661

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-2661 updated cvss 6.1

pcs: Improper node name field validation when creating clusters leads to XSS

  • Red Hat Enterprise Linux 6 pcs Red Hat Enterprise Linux 7 pcs, pcs-snmp, python-clufter Red Hat Storage 3 pcs
    affected: no fix planned “Will not fix”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.18% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 6.1 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

  • ClusterLabs pcs

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.