Theme My Login <= 7.1.15 - Authenticated (Subscriber+) Missing Authorization to Unauthorized Multisite Subsite Creation via 'gimmeanotherblog' Signup Stage
The Theme My Login plugin for WordPress is vulnerable to Missing Authorization in versions up to, and including, 7.1.15 on Multisite installations. This is due to the tml_ms_signup_handler() function's gimmeanotherblog branch failing to enforce the network's active_signup registration policy, checking only is_user_logged_in() while sibling branches such as validate-blog-signup apply the full policy gate. This makes it possible for authenticated attackers, with Subscriber-level access and above, to directly POST stage=gimmeanotherblog to Theme My Login's signup route, bypassing the configured registration policy entirely — even when it is set to none or user — which causes wpmu_create_blog() to execute with the attacker's user ID, after which WordPress core assigns the Administrator role on the newly created subsite via add_user_to_blog(). The privilege gain is scoped to the newly created subsite only; the attacker's account retains Subscriber-level access on the main site and does not obtain Super Admin or network-level capabilities such as manage_network or manage_sites.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| WordPress plugin | Theme My Login | <= 7.1.15 | 7.2.0 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N- Weakness (CWE)
CWE-862- Platform
- WordPress
- Package
Theme My Login- Disclosed
- 04.09.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
Wordfence Intelligence - 72585c12-baa9-4c63-8584-906a1d3b332f - Wordfence Intelligence
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Copyright 2012-2026 Defiant Inc.
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Vulnerability history: Theme My Login
All published vulnerabilities of this package (WordPress plugin), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 6
- First → latest
- 06.2014 09.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 5
Disclosures per year
- 2017: 0
- 2018: 0
- 2019: 0
- 2020: 0
- 2021: 0
- 2022: 0
- 2023: 0
- 2024: 1
- 2025: 1
- 2026: 3
earlier: 1
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Theme My Login <= 7.1.15 - Authenticated (Subscriber+) Missing Authorization to Unauthorized Multisite Subsite Creation via 'gimmeanotherblog' Signup Stage this entry
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