XSS Vulnerability in Joomla! Core by Joomla
CVE-2026-73336

5.1MEDIUM

Key Information:

Vendor

Joomla
Status
Joomla! Cms
Vendor
CVE Published:
18 August 2026

What is CVE-2026-73336?

An improper escaping flaw in Joomla! Core allows an attacker to exploit schema.org output, potentially leading to XSS attacks. This vulnerability affects multiple versions of Joomla, specifically from 5.1.0 to 5.4.7 and 6.0.0 to 6.1.2. A successful exploitation could enable an attacker to execute arbitrary scripts in the context of an affected user's session, jeopardizing the security and integrity of site data.

Affected Version(s)

Joomla! CMS 5.1.0-5.4.6

Joomla! CMS 6.0.0-6.1.2

References

https://www.joomla.org/
product
https://developer.joomla.org/security-centre/1073-2026080...
vendor-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

arib06
.