Stylemixmes Consulting Plugin up to 6.7.16 on WordPress Developer Access Login STMHandler.php transient_key/stm_developer_access_token privileges management

Summaryinfo

A vulnerability described as critical has been identified in Stylemixmes Consulting Plugin up to 6.7.16. This affects an unknown function of the file admin/admin-notices/classes/STMHandler.php of the component Developer Access Login. Such manipulation of the argument transient_key/stm_developer_access_token leads to privileges management. This vulnerability is uniquely identified as CVE-2026-14805. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Stylemixmes Consulting Plugin up to 6.7.16. Affected by this issue is an unknown code block of the file admin/admin-notices/classes/STMHandler.php of the component Developer Access Login. The manipulation of the argument transient_key/stm_developer_access_token with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The Consulting theme for WordPress is vulnerable to Privilege Escalation in versions up to, and including, 6.7.16. This is due to a combination of two flaws: (1) the masterstudy_ms_stm_set_discard_transient AJAX endpoint in admin/admin-notices/classes/STMHandler.php accepts an arbitrary transient key without capability checks or nonce validation, and (2) the developer access login mechanism in admin/classes/stm-theme-support.php authenticates users based on a transient value without proper cryptographic validation when in legacy string mode. This makes it possible for authenticated attackers, with subscriber-level access and above, to set the stm_developer_access_token transient to a known value (1), then authenticate as any existing user including administrators by visiting a specially crafted URL, thereby achieving full privilege escalation to administrator.

The advisory is shared for download at wordfence.com. This vulnerability is handled as CVE-2026-14805 since 07/06/2026. The exploitation is known to be easy. The attack may be launched remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/15/2026). The MITRE ATT&CK project declares the attack technique as T1068.

By approaching the search of inurl:admin/admin-notices/classes/STMHandler.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• WordPress Plugin

Vendor

• Stylemixmes

Name

• Consulting Plugin

Version

• 6.7.0
• 6.7.1
• 6.7.2
• 6.7.3
• 6.7.4
• 6.7.5
• 6.7.6
• 6.7.7
• 6.7.8
• 6.7.9
• 6.7.10
• 6.7.11
• 6.7.12
• 6.7.13
• 6.7.14
• 6.7.15
• 6.7.16

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

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• 🔒

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Entryinfo

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