Bears Backup <= 2.0.0 - Unauthenticated Remote Code Execution

2025-07-16 00:00

Trương Hữu Phúc (truonghuuphuc)

Strategic Overview

Status

Patched in 2.1.0

Affected PluginBears Backup

Affected Version<= 2.0.0

CVSS9.8Critical

CVECVE-2025-5396

View all Bears Backup vulnerabilities

Vulnerability Overview

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.

Technical Analysis

REMEDIATION: Update to version 2.1.0, or a newer patched version --- IDENTIFIER: CWE-94 (Improper Control of Generation of Code ('Code Injection')) 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.

External References

https://www.cve.org/CVERecord?id=CVE-2025-5396 https://www.wordfence.com/threat-intel/vulnerabilities/id/81b44abb-6d30-4930-b68b-9a04d93f5169

CVSS Vector

9.8

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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