UpdraftPlus: WP Backup & Migration Plugin <= 1.26.4 - Unauthenticated Authentication Bypass via UpdraftCentral udrpc

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Summary

CVECVE-2026-10795
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-11 07:16:26 UTC
Updated2026-06-11 14:42:47 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 8.1 HIGH from [email protected]

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

EPSS: 0.000350000 probability, percentile 0.109400000 (date 2026-06-13)

Problem Types: CWE-347 | CWE-347 CWE-347 Improper Verification of Cryptographic Signature

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary8.1HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED8.1HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Davidanderson UpdraftPlus WP Backup Migration Plugin affected 1.26.4 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/changeset/3561938/updraftplus/trunk/vendor/team-updraft/commo... [email protected] plugins.trac.wordpress.org
plugins.svn.wordpress.org/updraftplus/tags/1.26.4/vendor/team-updraft/common-libs/src/u... [email protected] plugins.svn.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/e901c2a0-2477-4b9a-8483-60024... [email protected] www.wordfence.com
plugins.svn.wordpress.org/updraftplus/tags/1.26.4/vendor/team-updraft/common-libs/src/u... [email protected] plugins.svn.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: XU WEI TING (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-06-03T21:23:51.000ZVendor Notified
CNA2026-06-10T16:41:29.000ZDisclosed
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