PT-2026-43289 · Open Source Matters · Joomla! Cms

Phan Phan Hai Long · CVE-2026-30894 · Published 2026-05-26 · Updated 2026-05-28

Positive Technologies (AI Summary)

CVSS v4.0

6.9

Medium

Base vector

AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Joomla CMS (affected versions not specified)

Description Lack of output escaping in the content history component allows for a Cross-Site Scripting (XSS) vector. XSS is a flaw where an attacker injects malicious scripts into content that is then executed in the browser of another user.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

XSS

Weakness Enumeration

CWE-79

Related Identifiers

BIT-JOOMLA-2026-30894

CVE-2026-30894

Affected Products

Joomla! Cms

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-30894 · Security Note
• https://developer.joomla.org/security-centre/1035-20260503-core-xss-in-com-contenthistory · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-30894 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-joomla-2026-30894 · Vendor Advisory
• https://t.me/cveNotify/164830 · Telegram Post
• https://twitter.com/dailycve/status/2059658068409880634 · Twitter Post