jsoup is a Java library for working with real-world HTML. From 1.14.3 until 1.23.1, jsoup's HTML parser could incorrectly handle a malformed tag name ending in a control character, causing the tag to acquire the parsing behavior of a different element. When a custom Safelist permits certain raw-text elements, this misparsing can cause content that should remain inert text to be emitted as active markup after serialization, potentially resulting in cross-site scripting. jsoup's built-in Safelists are not affected.
This issue is fixed in version 1.23.1.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Privileges Required
None
No privileges needed
User Interaction
Required
User action required
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products
jhy:jsoup
References 4
https://github.com/jhy/jsoup/commit/92f1aca552548b484bc7d4b94c51e48b8e6eca70
security-advisories@github.com
https://github.com/jhy/jsoup/issues/2538
security-advisories@github.com
https://github.com/jhy/jsoup/releases/tag/jsoup-1.23.1
security-advisories@github.com
https://github.com/jhy/jsoup/security/advisories/GHSA-pmhh-3w7g-xqp8
security-advisories@github.com