PatchSiren cyber security CVE debrief

CVE-2026-10795 davidanderson CVE debrief

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.

Vendor: davidanderson
Product: UpdraftPlus: WP Backup & Migration Plugin
CVSS: HIGH 8.1
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-11
Original CVE updated: 2026-06-11
Advisory published: 2026-06-11
Advisory updated: 2026-06-11

Who should care

Users of the UpdraftPlus: WP Backup & Migration Plugin for WordPress, particularly those with versions up to and including 1.26.4, should update to a patched version as soon as possible to prevent potential authentication bypass attacks.

Technical summary

The vulnerability exists in the UpdraftPlus_Remote_Communications_V2::wp_loaded function, where the plugin fails to properly validate the remote communications message format. This allows attackers to bypass signature verification and use a predictable encryption key, enabling them to forge and execute arbitrary RPC commands as an administrator.

Defensive priority

High

Recommended defensive actions

Update to a patched version of the UpdraftPlus: WP Backup & Migration Plugin (version greater than 1.26.4) as soon as possible.
Review and monitor plugin updates and security advisories from the vendor.
Consider implementing additional security measures, such as two-factor authentication and monitoring for suspicious activity.

Evidence notes

The CVE record and details were obtained from the official CVE.org and NVD sources.

Sources and references

Verified primary and authoritative sources

CVE-2026-10795 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2026-10795

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2026-10795 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-10795

NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Source reference
Unverified legacy reference

URL: https://plugins.svn.wordpress.org/updraftplus/tags/1.26.4/vendor/team-updraft/common-libs/src/updraft-rpc/class-udrpc.php

[email protected]
Source reference
Unverified legacy reference

URL: https://plugins.svn.wordpress.org/updraftplus/tags/1.26.4/vendor/team-updraft/common-libs/src/updraft-rpc/class-udrpc2.php

[email protected]
Source reference
Unverified legacy reference

URL: https://plugins.trac.wordpress.org/changeset/3561938/updraftplus/trunk/vendor/team-updraft/common-libs/src/updraft-rpc/class-udrpc2.php

[email protected]

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.