| Package | Affected versions | Patched versions |
|---|---|---|
| org.jsoup:jsoup | ≥ 1.14.3, < 1.23.1 | 1.23.1 |
When a custom Safelist permits certain raw-text elements, jsoup may incorrectly sanitize malformed HTML containing a tag name that ends in a control character. The tag may acquire the parsing behavior of a different element, causing content that should remain text to be emitted as active markup after serialization and potentially allowing XSS.
jsoup’s built-in Safelists are unaffected.
Upgrade to jsoup 1.23.1.
Until upgrading, do not permit raw-text elements in custom Safelists used to clean untrusted HTML.
This fix addresses malformed tag-name handling only.
Permitting raw-text elements in a custom Safelist does not make their contents inherently safe. For example, applications that permit style must apply appropriate CSS safeguards separately, because jsoup does not parse or sanitize CSS.
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