CVE-2024-34064 – Jinja vulnerable to HTML attribute injection when passing user input as keys to xmlattr filter

https://notcve.org/view.php?id=CVE-2024-34064

Jinja is an extensible templating engine. The `xmlattr` filter in affected versions of Jinja accepts keys containing non-attribute characters. XML/HTML attributes cannot contain spaces, `/`, `>`, or `=`, as each would then be interpreted as starting a separate attribute. If an application accepts keys (as opposed to only values) as user input, and renders these in pages that other users see as well, an attacker could use this to inject other attributes and perform XSS. The fix for CVE-2024-22195 only addressed spaces but not other characters. • https://github.com/pallets/jinja/commit/0668239dc6b44ef38e7a6c9f91f312fd4ca581cb https://github.com/pallets/jinja/security/advisories/GHSA-h75v-3vvj-5mfj https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/567XIGSZMABG6TSMYWD7MIYNJSUQQRUC https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCLF44KY43BSVMTE6S53B4V5WP3FRRSE https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SSCBHIL6BYKR5NRCBXP4XMP2CEEKGFVS https://lists.fedoraproject.org/a • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') •