Description
The UpdraftPlus: WP Backup & Migration Plugin plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 1.26.4 via the UpdraftPlus_Remote_Communications_V2::wp_loaded function. This is due to insufficient validation of the remote communications message format, where signature verification can be bypassed and unchecked decryption return values collapse to a predictable all-zero encryption key. This makes it possible for unauthenticated attackers to forge arbitrary RPC commands and run them as the connected administrator, such as uploading and activating a malicious plugin, which ultimately leads to remote code execution.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected products
Exploits & PoCs
- nucleiUpdraftPlus WP Backup & Migration Plugin - Authentication Bypassby theamanrawat,s4e-io
References
- MISChttps://www.wordfence.com/threat-intel/vulnerabilities/id/e901c2a0-2477-4b9a-8483-6002419e0a2f?source=cve
- MISChttps://plugins.svn.wordpress.org/updraftplus/tags/1.26.4/vendor/team-updraft/common-libs/src/updraft-rpc/class-udrpc2.php
- MISChttps://plugins.svn.wordpress.org/updraftplus/tags/1.26.4/vendor/team-updraft/common-libs/src/updraft-rpc/class-udrpc.php
- MISChttps://plugins.trac.wordpress.org/changeset/3561938/updraftplus/trunk/vendor/team-updraft/common-libs/src/updraft-rpc/class-udrpc2.php