Bearsthemes Bears Backup Plugin up to 2.0.0 on WordPress call_user_func code injection

Summaryinfo

A vulnerability categorized as critical has been discovered in Bearsthemes Bears Backup Plugin up to 2.0.0 on WordPress. The impacted element is the function call_user_func. Such manipulation leads to code injection. This vulnerability is referenced as CVE-2025-5396. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Bearsthemes Bears Backup Plugin up to 2.0.0 on WordPress. Affected by this issue is the function call_user_func. The manipulation with an unknown input leads to a code injection vulnerability. Using CWE to declare the problem leads to CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The Bears Backup plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 2.0.0. This is due to the bbackup_ajax_handle() function not having a capability check, nor validating user supplied input passed directly to call_user_func(). This makes it possible for unauthenticated attackers to execute code on the server which can be leverage to inject backdoors or create new administrative user accounts to name a few things. On WordPress sites running the Alone theme versions 7.8.4 and older, this can be chained with CVE-2025-5394 to install the Bears Backup plugin and achieve the same impact.

The weakness was published by Trương Hữu Phúc. The advisory is available at wordfence.com. This vulnerability is handled as CVE-2025-5396 since 05/30/2025. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/17/2025). This vulnerability is assigned to T1059 by the MITRE ATT&CK project.

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

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Backup Software

Vendor

• Bearsthemes

Name

• Bears Backup Plugin

Version

• 2.0

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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