CVE-2025-63083 Joomla! Project CVE debrief

Who should care

Defenders responsible for Joomla installations, especially those using versions within the affected ranges, should assess their exposure and take necessary actions to mitigate the vulnerability.

Why it matters

CVE-2025-63083 is a medium-severity vulnerability in the Joomla pagebreak plugin that allows for cross-site scripting (XSS) attacks due to a lack of output escaping. Defenders should prioritize verifying exposure in their Joomla installations, especially for versions within the affected ranges, and ensure proper input validation and output escaping.

• Defenders need to verify exposure in their Joomla installations to prevent potential XSS attacks.
• Proper input validation and output escaping are crucial to prevent exploitation of this vulnerability.
• Affected versions require immediate attention to prevent potential security breaches.

Technical summary

The pagebreak plugin for Joomla is vulnerable to a cross-site scripting (XSS) attack due to a lack of output escaping. This allows an attacker to inject malicious code, potentially leading to unauthorized actions or data exposure. The vulnerability affects Joomla versions from 3.9.0 to 5.4.2 and 6.0.0 to 6.0.2. Defenders should prioritize verifying exposure in their Joomla installations and ensure proper input validation and output escaping to prevent exploitation of this vulnerability.

Defensive priority

Defenders should prioritize verifying exposure in their Joomla installations, especially for versions within the affected ranges, and ensure proper input validation and output escaping.

Recommended defensive actions

• Verify Joomla version and check if it falls within the affected ranges (3.9.0 to 5.4.2 or 6.0.0 to 6.0.2).
• Ensure proper input validation and output escaping in the pagebreak plugin.
• Monitor for any suspicious activity related to the pagebreak plugin.

Evidence notes

The CVE record and NVD vulnerability detail provide information on the vulnerability, including its CVSS score, affected versions, and references to vendor advisories.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.