Skip to content
Fencer Vulns
medium 6.1

CVE-2018-14954 json

The mail message display page in SquirrelMail through 1.4.22 has XSS via the formaction attribute.

published 2018-08-05 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-6836

cvss
6.1
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.6%
EPSS 1.6% chance of exploitation in 30 days, percentile 76%
public exploits
0
none known

Summary

The mail message display page in SquirrelMail through 1.4.22 has XSS via the formaction attribute.

Patch / fix

  • squirrelmail Ubuntu 14.04 LTS 2:1.4.23~svn20120406-2+deb8u3build0.14.04.1
  • squirrelmail Ubuntu 16.04 LTS 2:1.4.23~svn20120406-2+deb8u3ubuntu0.16.04.1

ubuntu advisories UBUNTU-CVE-2018-14954

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-2018-14954 updated cvss 8.7

squirrelmail: persistent XSS in message display the formaction attribute

  • Red Hat Enterprise Linux 5 squirrelmail
    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

1.65% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • sourceforge.net https://sourceforge.net/p/squirrelmail/bugs/2831/ referenced PoC, tagged "exploit" by a source, unverified

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

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.