Critical severity vulnerability that affects bleach

2019-01-04T17:46:30
ID GHSA-M9MQ-P2F9-CFQV
Type github
Reporter GitHub Advisory Database
Modified 2019-07-03T21:02:06

Description

An issue was discovered in Bleach 2.1.x before 2.1.3. Attributes that have URI values weren't properly sanitized if the values contained character entities. Using character entities, it was possible to construct a URI value with a scheme that was not allowed that would slide through unsanitized.