WordPress is prone to a security-bypass vulnerability.
Attackers can exploit this issue to bypass certain security restrictions to perform unauthorized actions. This may aid in further attacks.
WordPress 4.7.4 and prior are vulnerable.
Information
WordPress WordPress 4.7.2
WordPress WordPress 4.7.1
WordPress WordPress 4.6.1
WordPress WordPress 4.5.2
WordPress WordPress 4.5.1
WordPress WordPress 4.5
WordPress WordPress 4.4.1
WordPress WordPress 4.4
WordPress WordPress 4.2.4
WordPress WordPress 4.2.3
WordPress WordPress 4.2.2
WordPress WordPress 4.2.1
WordPress WordPress 4.1.2
WordPress WordPress 4.1.1
WordPress WordPress 4.1
WordPress WordPress 3.9.2
WordPress WordPress 3.9.1
WordPress WordPress 3.9
WordPress WordPress 3.8.2
WordPress WordPress 3.8.1
WordPress WordPress 3.7.4
WordPress WordPress 3.7.1
WordPress WordPress 3.6.1
WordPress WordPress 3.6
WordPress WordPress 3.5.2
WordPress WordPress 3.5.1
WordPress WordPress 3.3.2
WordPress WordPress 3.2.2
WordPress WordPress 3.1.4
WordPress WordPress 3.1.3
WordPress WordPress 3.1.2
WordPress WordPress 3.1.1
WordPress WordPress 3.0.5
WordPress WordPress 3.0.4
WordPress WordPress 3.0.3
WordPress WordPress 3.0.2
WordPress WordPress 2.9.2
WordPress WordPress 2.9.1
WordPress WordPress 2.8.6
WordPress WordPress 2.8.5
WordPress WordPress 2.8.4
WordPress WordPress 2.8.3
WordPress WordPress 2.8.2
WordPress WordPress 2.8.1
WordPress WordPress 2.6.5
WordPress WordPress 2.6.2
WordPress WordPress 2.6.1
WordPress WordPress 2.5.1
WordPress WordPress 2.3.3
WordPress WordPress 2.3.2
WordPress WordPress 2.3.1
WordPress WordPress 2.2.3
WordPress WordPress 2.2.2
WordPress WordPress 2.2.1
WordPress WordPress 2.1.3
WordPress WordPress 2.1.2
WordPress WordPress 2.1.1
WordPress WordPress 2.0.11
WordPress WordPress 2.0.10
WordPress WordPress 2.0.7
WordPress WordPress 2.0.6
WordPress WordPress 2.0.5
WordPress WordPress 2.0.4
WordPress WordPress 2.0.3
WordPress WordPress 2.0.2
WordPress WordPress 2.0.1
WordPress WordPress 2.0
WordPress WordPress 1.5.2
WordPress WordPress 1.5.1 .3
WordPress WordPress 1.5.1 .2
WordPress WordPress 1.5.1
WordPress WordPress 1.5
WordPress WordPress 1.3.1
WordPress WordPress 1.2.2
WordPress WordPress 1.2.1
WordPress WordPress 1.2
WordPress WordPress 0.71
WordPress WordPress 0.6.2
WordPress WordPress 4.7.3
WordPress WordPress 4.7
WordPress WordPress 4.6
WordPress WordPress 4.5.3
WordPress WordPress 4.4.2
WordPress WordPress 4.3.1
WordPress WordPress 4.3
WordPress WordPress 4.2
WordPress WordPress 4.0.1
WordPress WordPress 4.0
WordPress WordPress 3.9.3
WordPress WordPress 3.9
WordPress WordPress 3.8.5
WordPress WordPress 3.8.4
WordPress WordPress 3.8.3
WordPress WordPress 3.8
WordPress WordPress 3.7.5
WordPress WordPress 3.7
WordPress WordPress 3.6
WordPress WordPress 3.5.0
WordPress WordPress 3.5
WordPress WordPress 3.4.2
WordPress WordPress 3.4.1
WordPress WordPress 3.4.0
WordPress WordPress 3.4
WordPress WordPress 3.3.3
WordPress WordPress 3.3.1
WordPress WordPress 3.3
WordPress WordPress 3.2.1
WordPress WordPress 3.2
WordPress WordPress 3.1
WordPress WordPress 3.0.6
WordPress WordPress 3.0.1
WordPress WordPress 2.9.1.1
WordPress WordPress 2.9
WordPress WordPress 2.8.5.2
WordPress WordPress 2.8.5.1
WordPress WordPress 2.8
WordPress WordPress 2.7.1
WordPress WordPress 2.7
WordPress WordPress 2.6.3
WordPress WordPress 2.6
WordPress WordPress 2.5
WordPress WordPress 2.3
WordPress WordPress 2.2.0
WordPress WordPress 2.2
WordPress WordPress 2.1
WordPress WordPress 2.0.9
WordPress WordPress 2.0.8
WordPress WordPress 1.6.2
WordPress WordPress 1.6
WordPress WordPress 1.5.1.1
WordPress WordPress 1.5
WordPress WordPress 1.4
WordPress WordPress 1.3.3
WordPress WordPress 1.3.2
WordPress WordPress 1.3
WordPress WordPress 1.2.5
WordPress WordPress 1.2.4
WordPress WordPress 1.2.3
WordPress WordPress 1.1.1
WordPress WordPress 1.0.2
WordPress WordPress 1.0.1
WordPress WordPress 0.72
WordPress WordPress 0.711
WordPress WordPress 0.71
WordPress WordPress 0.7
WordPress WordPress 0.6.2.1
Exploit
The researcher who discovered this issue has created a proof-of-concept. Please see the references for more information.