Joomla Extension up to 5.4.8/6.1.3 Caching Layer path traversal

Summaryinfo

A vulnerability, which was classified as problematic, was found in Joomla Extension up to 5.4.8/6.1.3. Affected is an unknown function of the component Caching Layer. Such manipulation leads to path traversal. This vulnerability is documented as CVE-2026-90915. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Joomla Extension up to 5.4.8/6.1.3 and classified as problematic. Affected by this issue is some unknown functionality of the component Caching Layer. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is integrity, and availability. CVE summarizes:

Joomla! Core - [20260905] - Core - Arbitrary directory deletion via cache purge action in Joomla 4.0.0-5.4.8, 6.0.0-6.1.3 -An improper validation of the cache group name allowed path traverals in the file storage of the caching layer, resulting in arbitrary directory deletions.

This vulnerability is handled as CVE-2026-90915 since 09/14/2026. The exploitation is known to be easy. The attack may be launched remotely. The exploitation needs additional levels of successful authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 09/29/2026). The MITRE ATT&CK project declares the attack technique as T1006.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Content Management System

Vendor

• Joomla

Name

• Extension

Version

• 5.4.0
• 5.4.1
• 5.4.2
• 5.4.3
• 5.4.4
• 5.4.5
• 5.4.6
• 5.4.7
• 5.4.8
• 6.1.0
• 6.1.1
• 6.1.2
• 6.1.3

License

• open-source

Website

• Vendor: https://www.joomla.org/

CPE 2.3info

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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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