Debian LTS: DLA-1942-2 Moderate: phpBB3 CSRF Token Issue

Package : phpbb3
Version : 3.0.12-5+deb8u4
CVE ID : CVE-2019-13776 CVE-2019-16993

CVE-2019-16993

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

CVE-2019-13776

phpBB allowed the stealing of an Administration Control Panel session id
by leveraging CSRF in the Remote Avatar feature. The CSRF Token Hijacking
lead to stored XSS.

For Debian 8 "Jessie", these problems have been fixed in version
3.0.12-5+deb8u4.

We recommend that you upgrade your phpbb3 packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS