CVE-2026-77826 json
RegistrationMagic 5.0.1.8 - 6.0.9.8 - Unauthenticated Authentication Bypass via Missing Facebook Token Audience Validation
published 2026-09-05 2 mo ago modified 2026-09-08 2 mo ago also EUVD-2026-71848
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 35%
- public exploits
- 0
- none known
Summary
The RegistrationMagic WordPress plugin before 6.0.9.9 does not verify which application a Facebook access token was issued to before accepting it as proof of identity, allowing unauthenticated attackers to log in as an existing user whose token they can obtain, or to create and log into a new account even when user registration is disabled.
Patch / fix
- Unknown RegistrationMagic 6.0.9.9
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 2 mo ago
Exploit prediction
0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- wpscan.com https://wpscan.com/vulnerability/b79a83e8-d7b0-4aa8-b2ba-37a7eecd437b/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Affected products
- Unknown RegistrationMagic
Classification
- Weakness
-
- CWE-287 Improper Authentication
- Technology feeds
References
-
wpscan.com
/vulnerability/b79a83e8-d7b0-4aa8-b2ba-37a7eecd437b/
exploit, vdb-entry, technical-description
Sources
- CVE List CVE-2026-77826
- NVD CVE-2026-77826
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.