CVE-2026-48611: critical vulnerability in phpBB
Published
85Vexday Risk Score
Patch now. It exploitation observed by VulnCheck and has a working public exploit.
ssvc Actcvss 9.8epss 2.9%
from disclosure to weapon1 days
Published on NVDJun 12
1st PoC+1d
VulnCheck+38d
exploitation probability
2.9%top 13% of all CVEs
observed exploitation
yesVulnCheck
7 public exploit(s)
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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
phpBB · phpBBpublic PoCs found — 7
githubgithub.com/citruscitruscitruscitruscitrusci/CVE-2026-48611-poc★ 1githubgithub.com/Ethicalgrey/phpBB-CVE-2026-48611★ 0githubgithub.com/wanmywan/CVE-2026-48611-phpBB★ 0githubgithub.com/Diznev/CVE-2026-48611-EXPLOIT★ 0vulncheckvulncheck.com/xdb/ffb215a40c3funverifiedvulncheckvulncheck.com/xdb/ec492fbb5dcfunverifiedvulncheckvulncheck.com/xdb/896b003a27a1unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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