Vulnerability · Published Feb 27, 2026 · Assigned by CERT-PL

CVE-2026-24352Session Fixation in PluXml CMS

Medium 4.8

In plain English

A medium-severity session fixation in PluXml CMS from PluXml. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities).

Severity (CVSS 4.0)4.8Medium

Exploit odds (30 days)0.4%top 66.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

PluXml CMS allows a user's session identifier to be set before authentication. The value of this session ID stays the same after authentication. This behaviour enables an attacker to fix a session ID for a victim and later hijack the authenticated session. The vendor was notified early about this vulnerability, but didn't respond with the details of vulnerability or vulnerable version range. Only versions 5.8.21 and 5.9.0-rc7 were tested and confirmed as vulnerable, other versions were not tested and might also be vulnerable.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Ubuntu:22.04:LTS	pluxml	no fix listed	UBUNTU-CVE-2026-24352

Affected products (as reported)

Vendor	Product	Versions
PluXml	PluXml CMS	5.9.0-rc75.8.21

Weakness: CWE-384 · Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

References

https://pluxml.org/ product
https://cert.pl/posts/2026/03/CVE-2026-24350 third-party-advisory