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Vulnerability record · CVE-2019-16993 · published 30 September 2019

CVE-2019-16993: Phpbb cross-site request forgery vulnerability

Phpbb · Phpbb

In phpBB before 3.1.7-PL1, includes/acp/acp_bbcodes.php has improper verification of a CSRF token on the BBCode page in the Administration Control Panel. An actual CSRF attack is possible if an attacker also manages to retrieve the session id of a reauthenticated administrator prior to targeting them.

8.8 CVSS 3.1 High EPSS 0.80% · top 45.0% CWE-352 · Cross-site request forgery
8.8CVSS 3.1 base score, v2 6.8
0.80%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

Description

In phpBB before 3.1.7-PL1, includes/acp/acp_bbcodes.php has improper verification of a CSRF token on the BBCode page in the Administration Control Panel. An actual CSRF attack is possible if an attacker also manages to retrieve the session id of a reauthenticated administrator prior to targeting them.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/phpbb/phpbb/commit/18abef716ecf42a35416444f3f84f5459d573789 PatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/09/msg00036.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/10/msg00006.html Third Party Advisory
https://www.phpbb.com/community/viewtopic.php?t=2352606 Vendor Advisory
https://www.phpbb.com/support/documents.php?mode=changelog&version=3#v317 Vendor Advisory
https://github.com/phpbb/phpbb/commit/18abef716ecf42a35416444f3f84f5459d573789 PatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/09/msg00036.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/10/msg00006.html Third Party Advisory
https://www.phpbb.com/community/viewtopic.php?t=2352606 Vendor Advisory
https://www.phpbb.com/support/documents.php?mode=changelog&version=3#v317 Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2019-16993), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.