CVE-2019-16993 Information

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 Vector

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

Reference

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

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8