CVE-2026-75956 cmsjunkie.com CVE debrief

Who should care

System administrators and security teams responsible for Joomla installations, particularly those using the J-BusinessDirectory extension, should be aware of this vulnerability. The risk is especially high for environments where user input is not strictly validated or where the extension has not been regularly updated.

Technical summary

CVE-2026-75956 is a DOS vulnerability in the Joomla Extension - cmsjunkie.com - J-BusinessDirectory. The vulnerability arises from the lack of strict typing in pagination parameter handling, allowing array or non-numeric values to trigger PHP type errors in arithmetic operations. Specifically, the 'limitstart' parameter and potentially others could be exploited by providing values such as 'limitstart[]', which could lead to type errors when used in list queries. Additionally, the 'limit' parameter was not validated before use in list queries, further increasing the risk of DOS attacks.

Defensive priority

Organizations using Joomla Extension - cmsjunkie.com - J-BusinessDirectory should verify their versions and ensure they are updated to 6.2.3 or later to mitigate potential DOS vectors in pagination parameter handling.

Recommended defensive actions

• Verify J-BusinessDirectory version and update to 6.2.3 or later
• Restrict pagination parameter input to numeric values
• Implement input validation for limit and limitstart parameters
• Monitor for unusual traffic patterns indicative of potential DOS attacks
• Review PHP error logs for type errors related to pagination handling

Evidence notes

The CVE-2026-75956 record indicates a DOS vector in pagination parameter handling in J-BusinessDirectory < 6.2.3 due to unstrict typing of pagination values, which could trigger PHP type errors. However, detailed information about affected versions and specific attack scenarios is limited.

Official resources