CVE-2026-24351: PluXml CMS is vulnerable to Stored XSS in Static Pages editing functionality

Routine

MEDIUM 5.4DOWNGRADE

CVE-2026-24351 is a medium-severity flaw (CVSS 5.4) affecting pluxml. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

PluXml CMS is vulnerable to Stored XSS in Static Pages editing functionality. Attacker with editing privileges can inject arbitrary HTML and JS into website, which will be rendered/executed when visiting edited page. 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 wer

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 90%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-02-27
Last modified	2026-06-17

Publisher (CNA): CERT.PL · Vendor: pluxml

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-27 12:16 UTCPublished CVE record published
2026-06-17 10:22 UTCUpdated Record last modified

pluxml pluxml DOWNGRADE

Affected: 5.8.21 · 5.9.0 rc7

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.8.21

1. Check installed version

apt-cache policy pluxml || rpm -q pluxml || pluxml --version

2. No fixed release: DOWNGRADE to a release before 5.8.21 (Debian / Ubuntu)

apt-cache madison pluxml sudo apt install pluxml=<VERSION_BEFORE_5.8.21> sudo apt-mark hold pluxml

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list pluxml sudo dnf downgrade pluxml-<VERSION_BEFORE_5.8.21> sudo dnf versionlock add pluxml

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-24351?

pluxml: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-24351 being exploited?

CVE-2026-24351 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-24351 affect?

CVE-2026-24351 affects pluxml. Severity is medium (CVSS 5.4). PluXml CMS is vulnerable to Stored XSS in Static Pages editing functionality. Attacker with editing privileges can inject arbitrary HTML and JS into website, which will be rendered/executed when visiting edited page. The vendor was notifie

How urgent is CVE-2026-24351?

Priority 21/100. No elevated risk signals yet.

Related CVEs

CVE-2025-15438 MEDIUM 4.7 UPGRADE A vulnerability was determined in PluXml up to 5.8.22
CVE-2026-24352 CRITICAL 9.8 DOWNGRADE PluXml CMS allows a user's session identifier to be set before authentication
CVE-2026-24350 MEDIUM 5.4 DOWNGRADE PluXml CMS is vulnerable to Stored XSS in file uploading functionality
CVE-2025-70129 MEDIUM 5.3 UPGRADE If the anti spam-captcha functionality in PluXml versions 5.8.22 and earlier is enabled, a captcha challenge i
CVE-2025-70128 MEDIUM 6.1 UPGRADE A Stored Cross-Site Scripting (XSS) vulnerability exists in the PluXml article comments feature for PluXml ver

References

← Back to latest CVEs