CVE-2026-11551Network attack vector

Unauthenticated account takeover via unchecked password reset

Published Jun 19, 2026 · Updated Jun 19, 2026

Privilege escalation in WPMU DEV Branda 3.4.29 and earlier allows remote attackers to take over arbitrary accounts by resetting passwords. The password-update path in inc/modules/login-screen/signup-password.php writes a new password without validating the requester's identity. No authentication or user interaction is required; targeting an administrator account grants administrative access to the WordPress site.

CVSS severity9.8
Critical
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in WPMU DEV Branda 3.4.29 and earlier allows remote attackers to take over arbitrary accounts by resetting passwords. The password-update path in inc/modules/login-screen/signup-password.php writes a new password without validating the requester's identity. No authentication or user interaction is required; targeting an administrator account grants administrative access to the WordPress site.

The record

CVE
CVE-2026-11551
Published
Jun 19, 2026
Updated
Jun 19, 2026
Vendor
AIOSEO Plugin Team
Product
Branda
Classifications
CWE-640, T1098
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=3.4.29

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

AIOSEO Plugin Team · Brandaversion=0 <=3.4.29

Published CVSS scores

9.8WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-640Weak Password Recovery Mechanism for Forgotten Password
T1098Account Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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