CVE-2026-90914Network attack vectorHinoki check available

Cross-site scripting via unescaped media layouts

Published Sep 29, 2026 · Updated Sep 29, 2026

Cross-site scripting in Joomla! CMS 4.0.0 through 5.4.8 and 6.0.0 through 6.1.3 allows attackers to run script in visitors' browsers. The generic audio and video output layouts render media values without sufficient escaping, allowing crafted values to become executable markup. Exploitation requires high-privilege access to place affected content and a visitor to view its rendered media.

CVSS severityUnavailable
Unscored
EPSS probability0.22%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Cross-site scripting in Joomla! CMS 4.0.0 through 5.4.8 and 6.0.0 through 6.1.3 allows attackers to run script in visitors' browsers. The generic audio and video output layouts render media values without sufficient escaping, allowing crafted values to become executable markup. Exploitation requires high-privilege access to place affected content and a visitor to view its rendered media.

The record

CVE
CVE-2026-90914
Published
Sep 29, 2026
Updated
Sep 29, 2026
Vendor
Joomla! Project
Product
Joomla! CMS
Classifications
CWE-79
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.0.0-5.4.8
  2. Affected versionversion=6.0.0-6.1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Joomla! Project · Joomla! CMSversion=4.0.0-5.4.8; version=6.0.0-6.1.3

Published CVSS scores

5.9Joomla! ProjectCVSS: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:U

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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