CVE-2026-24351Network attack vector

Stored XSS via unsanitized static-page content

Published Feb 27, 2026 · Updated Feb 27, 2026

Stored XSS in PluXml CMS 5.8.21 and 5.9.0-rc7 allows remote authenticated users to execute JavaScript via edited static pages. The Static Pages editor accepts arbitrary HTML and JavaScript in page content and later renders the saved content in visitors’ browsers without neutralizing executable markup. Editing privileges are required to plant the payload, and execution requires another user to visit the modified page, exposing that user’s browser session to same-origin script actions.

CVSS severity5.1
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in PluXml CMS 5.8.21 and 5.9.0-rc7 allows remote authenticated users to execute JavaScript via edited static pages. The Static Pages editor accepts arbitrary HTML and JavaScript in page content and later renders the saved content in visitors’ browsers without neutralizing executable markup. Editing privileges are required to plant the payload, and execution requires another user to visit the modified page, exposing that user’s browser session to same-origin script actions.

The record

CVE
CVE-2026-24351
Published
Feb 27, 2026
Updated
Feb 27, 2026
Vendor
PluXml
Product
PluXml
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.8.21
  2. Affected versionversion=5.9.0-rc7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

PluXml · PluXmlversion=5.8.21; version=5.9.0-rc7

Published CVSS scores

5.1CERT.PLCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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