CVE-2026-29204

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Summary

CVECVE-2026-29204
StatePUBLISHED
Assignerhackerone
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-12 18:16:51 UTC
Updated2026-05-13 15:54:09 UTC
DescriptionInsufficient ownership check in `clientarea.php` allows an authenticated client area user to submit requests using another user’s `addonId` without any ownership validation leading to unauthorized access to the victim's account.

Risk And Classification

Primary CVSS: v3.1 9.1 CRITICAL from [email protected]

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

EPSS: 0.000440000 probability, percentile 0.134720000 (date 2026-05-20)

Problem Types: CWE-639 | CWE-639 CWE-639 Insecure Direct Object Reference (IDOR)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
3.1CNADECLARED9.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA WebPros WHMCS affected 7.4.0 18.12.2 semver Not specified
CNA WebPros WHMCS affected 18.13.0 18.13.3 semver Not specified
CNA WebPros WHMCS affected 9.0.0 9.0.4 semver Not specified

References

ReferenceSourceLinkTags
help.whmcs.com/m/125386/l/2073908-cve-2026-29204 [email protected] help.whmcs.com
help.whmcs.com/m/125386/l/2073908-cve-2026-29204 MITRE help.whmcs.com
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