Joomla CMS up to 3.10.20/4.4.13/5.3.3 Input Filter Framework checkAttribute cross site scripting

Summaryinfo

A vulnerability was found in Joomla CMS up to 3.10.20/4.4.13/5.3.3 and classified as problematic. This vulnerability affects the function checkAttribute of the component Input Filter Framework. Executing a manipulation can lead to cross site scripting. This vulnerability appears as CVE-2025-54476. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in Joomla CMS up to 3.10.20/4.4.13/5.3.3. It has been declared as problematic. This vulnerability affects the function checkAttribute of the component Input Filter Framework. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. CVE summarizes:

Improper handling of input could lead to an XSS vector in the checkAttribute method of the input filter framework class.

The weakness was presented by Flydragon, Poi, Cwy and Xtrimi. The advisory is shared for download at developer.joomla.org. This vulnerability was named CVE-2025-54476 since 07/23/2025. The exploitation appears to be easy. The attack can be initiated remotely. Additional levels of successful authentication are necessary for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/30/2025). The MITRE ATT&CK project declares the attack technique as T1059.007.

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

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-31744). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Content Management System

Vendor

• Joomla

Name

• CMS

Version

• 3.10.0
• 3.10.1
• 3.10.2
• 3.10.3
• 3.10.4
• 3.10.5
• 3.10.6
• 3.10.7
• 3.10.8
• 3.10.9
• 3.10.10
• 3.10.11
• 3.10.12
• 3.10.13
• 3.10.14
• 3.10.15
• 3.10.16
• 3.10.17
• 3.10.18
• 3.10.19
• 3.10.20
• 4.4.0
• 4.4.1
• 4.4.2
• 4.4.3
• 4.4.4
• 4.4.5
• 4.4.6
• 4.4.7
• 4.4.8
• 4.4.9
• 4.4.10
• 4.4.11
• 4.4.12
• 4.4.13
• 5.3.0
• 5.3.1
• 5.3.2
• 5.3.3

License

• open-source

Website

• Vendor: https://www.joomla.org/

CPE 2.3info

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Once again VulDB remains the best source for vulnerability data.

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