CVE-2026-29002Public exploitNetwork attack vector

Admin-to-SuperAdmin escalation via client-controlled role parameter

Published Apr 10, 2026 · Updated Apr 10, 2026

Privilege escalation in CouchCMS 2.4.0 and earlier allows remote authenticated users with Admin access to create SuperAdmin accounts. The user-creation handler accepts the client-controlled f_k_levels_list role value and honors 10 instead of enforcing the Admin account's permitted value of 4. Admin-level access and interception of the request body are required; the resulting SuperAdmin account grants full application control.

CVSS severity8.6
High
EPSS probability0.43%
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 CouchCMS 2.4.0 and earlier allows remote authenticated users with Admin access to create SuperAdmin accounts. The user-creation handler accepts the client-controlled f_k_levels_list role value and honors 10 instead of enforcing the Admin account's permitted value of 4. Admin-level access and interception of the request body are required; the resulting SuperAdmin account grants full application control.

The record

CVE
CVE-2026-29002
Published
Apr 10, 2026
Updated
Apr 10, 2026
Vendor
CouchCMS
Product
CouchCMS
Classifications
CWE-639, T1098
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 10, 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 <=2.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

CouchCMS · CouchCMSversion=0 <=2.4.0

Published CVSS scores

8.6VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.2VulnCheckCVSS:3.1/AV:N/AC:L/PR:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1098Account Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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