CVE-2026-92231CWE-79cross-site-scripting

CVE-2026-92231

Medium · published September 29, 2026

CVSS v3.1
6.7
EPSS
0%
Percentile
17.9
In the wild
Unconfirmed
What it is

Joomla! Core - [20260915] - Core - XSS filter bypass in InputFilter via HTML5 entity decode mismatch in Joomla 1.5.0-5.4.8, 6.0.0-6.1.3 - The checkAttribute method normalized an attribute value before testing it against the "javascript:" scheme regex, however without decoding HTML5 entities beforehand, causing an XSS vector.

The record
Technical detail
CVSS v3.1
6.7 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L
CVSS v4.0
7.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:P
EPSS
0.00268 · 17.9th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-09-29T21:17Z
Affected products (2)
ProductVersionsFixed in
joomla/joomla\!≥ 1.5.0, < 5.4.85.4.8
joomla/joomla\!≥ 6.0.0, < 6.1.36.1.3
References (2)
https://developer.joomla.org/security-centre/1095-20260915-core-xss-filter-bypass-in-inputfilter-via-html5-entity-decode-mismatch.html · [email protected]https://www.joomla.org/ · [email protected]
EPSS history
Timeline
  • 01 OCT 03:50Z
    EPSS moved — → 0%
    epss
  • 29 SEP 16:40Z
    Joomla! Core - [20260915] - Core - XSS filter bypass in InputFilter via HTML5 entity decode mismatch in Joomla 1.5.0-5.4.8, 6.0.0-6.1.3
    cvelistv5