The access_has_bug_level function in core/access_api.php in MantisBT before 1.2.9 does not properly restrict access when the private_bug_view_threshold is set to an array, which allows remote attackers to bypass intended restrictions and perform certain operations on private bug reports.
secunia.com/advisories/48258
secunia.com/advisories/49572
secunia.com/advisories/51199
security.gentoo.org/glsa/glsa-201211-01.xml
www.debian.org/security/2012/dsa-2500
www.mantisbt.org/bugs/changelog_page.php?version_id=140
www.mantisbt.org/bugs/view.php?id=10124
www.openwall.com/lists/oss-security/2012/03/06/9
www.securityfocus.com/bid/52313
github.com/mantisbt/mantisbt/commit/eb803ed02105fc919cf5f789e939f2b824162927
lists.fedoraproject.org/pipermail/package-announce/2012-November/092926.html
lists.fedoraproject.org/pipermail/package-announce/2012-November/093063.html
lists.fedoraproject.org/pipermail/package-announce/2012-November/093064.html