CVE-2025-48827

vBulletin 5.0.0 through 5.7.5 and 6.0.0 through 6.0.3 allows unauthenticated users to invoke protected API controllers' methods when running on PHP 8.1 or later, as demonstrated by the /api.php?method=protectedMethod pattern, as exploited in the wild in May 2025.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
10 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
mitreCNA
10 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CISA-ADPADP
---
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Base Score
CVSS 3.x
EPSS Score
Percentile: 98%
VendorProductVersion
vbulletinvbulletin
5.0.0 ≤
𝑥
≤ 5.7.5
vbulletinvbulletin
6.0.0 ≤
𝑥
≤ 6.0.3
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://karmainsecurity.com/dont-call-that-protected-method-vbulletin-rce
https://kevintel.com/CVE-2025-48827
https://blog.kevintel.com/vbulletin-replaceadtemplate-kev/