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CVE-2026-48611

phpBB phpBB CWE-287

Improper authentication checks in the OAuth implementation allow account hijacking even when OAuth is not configured or enabled leading to unauthorized access in default installations.

CVSS Score
9.8
Critical
EPSS — Exploit Probability
3.9%
Riskier than 90% of all CVEs · checked 2026-09-11
Exploitation
Not in CISA KEV
KEV does not include every exploited vulnerability
Remediation
unknown
Check vendor advisories
NVD entry PoC / advisory

1 article across 1 outlet · first covered Jun 16, 2026 · latest Jun 16, 2026

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