CVE-2026-12255 json
MainWP Child < 6.1.2 - Unauthenticated Administrator Authentication Bypass via Passwordless Site Registration
published 2026-07-27 3 mo ago modified 2026-07-27 3 mo ago also EUVD-2026-49065
- cvss
- 8.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 40%
- public exploits
- 0
- none known
Summary
The MainWP Child WordPress plugin before 6.1.2 does not verify the requester's identity in its site-registration request handler when password authentication has been disabled for the targeted account, allowing an unauthenticated attacker to obtain a valid authentication session as that account, including an administrator, by naming its login in a single registration request.
Patch / fix
- Unknown MainWP Child 6.1.2
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 3 mo ago
Exploit prediction
0.47% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- wpscan.com https://wpscan.com/vulnerability/6ecd37bf-f48a-4f7f-8a93-e7f0475371af/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Unknown MainWP Child
Classification
- Weakness
-
- CWE-287 Improper Authentication
- Technology feeds
References
-
wpscan.com
/vulnerability/6ecd37bf-f48a-4f7f-8a93-e7f0475371af/
exploit, vdb-entry, technical-description
Sources
- CVE List CVE-2026-12255
- NVD CVE-2026-12255
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.