CVE-2026-90918
mediumJoomla!
Vendor / product: Joomla — joomla\!
Joomla! Core - [20260908] - Core - XSS in HTML Mail Templates in Joomla 4.0.0-5.4.8, 6.0.0-6.1.3 - The mail template feature lacks an escaping mechanism, causing XSS vectors in multiple extensions.
CVSS
5.3
5.3 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-09-29 17:17
Modified: 2026-10-06 16:35
NVD status: Analyzed
Last synced 3 days ago
Verified against the source API 2026-10-27 06:56 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
joomla / joomla\! ≥4.0.0 <5.4.8, ≥6.0.0 <6.1.3
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
References
- https://developer.joomla.org/security-centre/1088-20260908-core-xss-in-html-mail-templates... security@joomla.org
- https://www.joomla.org/ security@joomla.org
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:56 UTC · record ↗