CVE-2026-10795

UpdraftPlus: WP Backup & Migration Plugin <= 1.26.4 (free) < 2.26.5 (premium) - Unauthenticated Authentication Bypass via UpdraftCentral udrpc

2026-06-10 16:41

Strategic Overview

Status: Patched in 1.26.5
Affected Plugin: UpdraftPlus: WP Backup & Migration Plugin
Affected Version: <= 1.26.4
CVSS: 9.8Critical
Weakness type: CWE-347 · Improper Verification of Cryptographic Signature
CVE: CVE-2026-10795

View all UpdraftPlus: WP Backup & Migration Plugin vulnerabilities

At a glance

CVE-2026-10795 is a critical-severity Improper Verification of Cryptographic Signature vulnerability in the UpdraftPlus WordPress plugin, affecting versions <= 1.26.4. It carries a CVSS score of 9.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 1.26.5; sites on affected versions should update now. Disclosed June 2026, reported by vtim.

Vulnerability Overview

The UpdraftPlus: WP Backup & Migration Plugin plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 1.26.4 (free) and versions up to 2.26.5 (premium) 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.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.

CWE-347: Improper Verification of Cryptographic Signature

The product does not verify, or incorrectly verifies, the cryptographic signature for data.

Remediation

Update to version 1.26.5, or a newer patched version

How does WordSec protect against this?

This one needs no account at all, which puts it outside what login hardening can reach; WordSec's login security narrows the account-level paths around it, and the firewall is what inspects the request itself. None of that substitutes for the fix: UpdraftPlus 1.26.5 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-10795 https://www.wordfence.com/threat-intel/vulnerabilities/id/e901c2a0-2477-4b9a-8483-6002419e0a2f https://nvd.nist.gov/vuln/detail/CVE-2026-10795

Related records

Other vulnerabilities in UpdraftPlus: WP Backup & Migration Plugin

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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