CVE-2026-92231
No known exploitation. EPSS puts it in the 18th percentile. Fixed in 5.4.8.
What to do
Find your product and version, then upgrade to the build on the right.
- Joomla! Project Joomla! CMSAffected: 1.5.0-5.4.8Upgrade to: not statedAffected: 6.0.0-6.1.3Upgrade to: not statedStated by: CVE record
- Joomla! Project Joomla! Framework Filter packageAffected: 1.0.0-3.0.6Upgrade to: not statedAffected: 4.0.0-4.1.0Upgrade to: not statedStated by: CVE record
- Joomla\!Affected: ≥ 1.5.0, < 5.4.8Upgrade to: 5.4.8Stated by: NVD
Versions as the sources state them. Full version matrix after sign-in
What it is
From the CVE record
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.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.3% chance of exploitation activity in the next 30 days, which ranks it in the 18th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
9 events over 23 days, from the signal feeds we watch.
- OpenVAS check added
- Patch availablerecord updated
- Record updated
- Publishedweakness classified, att&ck mapped, record updated, record updated
Affected products
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L
Scored 6.7 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required HighRequires admin or elevated privileges
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability LowReduced performance or intermittent disruption of service
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
Watch the software you run.
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We'll flag the next CVE, public exploit or patch for Joomla! CMS, not every advisory.
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