Intel

CVE-2026-92231

joomla: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (CVE-2026-92231)

highEPSS 0.3%

Description

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.

Source: OSV (Open Source Vulnerabilities)NVD (NIST)cvelistv5BSI CSAFBSI WID Portal

Affected products

The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

bitnamijoomla
1.5.06.0.0

Metrics

XIEM Effective CVSS
7.1
Source: cna-v4
EPSS percentile
17.4 %
Elevated — this CVE ranks above at least 10% of all CVEs scored today.
KEV status
—
Show all metrics
Severity
high
Priority score
67.92
Exploit maturity
no public PoC known
CVSS v3
6.7
CVSS v4
7.1
EPSS score
0.3 %
Low — model estimates < 1% exploitation likelihood.
Published
2026-10-07 11:45 UTC
CWE
CWE-79

Weakness classes (CWE)

  • CWE-79Base

    Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

    The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

    cwe.mitre.org →

References & sources

Reanalysis & status changes

Chronological NVD audit events for this CVE — reanalyses, CVSS updates, CPE diffs.

  1. Initial Analysis2026-10-06 16:41 UTC· nvd@nist.gov
    • CVSS V3.1: AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L
    • CPE Configuration: OR *cpe:2.3:a:joomla:joomla!:*:*:*:*:*:*:*:* versions from (including) 6.0.0 up to (excluding) 6.1.3 *cpe:2.3:a:joomla:joomla!:*:*:*:*:*:*:*:* versions from (including) 1.5.0 up to (excluding) 5.4.8
    • Reference Type: Joomla! Project: https://developer.joomla.org/security-centre/1095-20260915-core-xss-filter-bypass-in-inputfilter-via-html5-entity-decode-mismatch.html Types: Patch, Vendor Advisory
    • Reference Type: Joomla! Project: https://www.joomla.org/ Types: Product
  2. CVE Modified2026-09-30 16:19 UTC· 134c704f-9b21-4f2e-91b3-4a467353bcc0
    • SSVC: {"id":"CVE-2026-92231","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalI…
  3. New CVE Received2026-09-29 17:17 UTC· security@joomla.org
    • Description: 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.
    • CVSS V4.0: AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
    • CWE: CWE-79
    • Affected: New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/92xxx/CVE-2026-92231.json">CVE-2026-92231</a>