6.4

CVE-2026-72720

Discourse: HTML injection in PrettyText.format_for_email from cooked-attribute reparsing

Discourse is an open-source discussion platform. Prior to 2026.1.7, 2026.6.2, 2026.7.1, and 2026.8.0-latest.1, Discourse has HTML injection in PrettyText.format_for_email because cooked attribute values are reparsed as markup. Crafted Vimeo iframe sources, secure-upload URLs or dimensions, and hashtag data-slug values can cause decoded attribute text to be reinterpreted as HTML. The vulnerable conversion also fails to strictly validate the Vimeo iframe host and path, allowing non-Vimeo allowlisted iframes to be converted. This issue is fixed in versions 2026.1.7, 2026.6.2, 2026.7.1, and 2026.8.0-latest.1.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
Herstellerdiscourse
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Produkt discourse
Version < 2026.1.7
Status affected
Version >= 2026.6.0-latest, < 2026.6.2
Status affected
Version >= 2026.7.0-latest, < 2026.7.1
Status affected
Version >= 2026.8.0-latest, < 2026.8.0-latest.1
Status affected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.3% 0.223
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security-advisories@github.com 6.4 3.1 2.7
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

https://github.com/discourse/discourse/security/advisories/GHSA-3q6f-6gm9-m35v
https://github.com/discourse/discourse/pull/42244
https://github.com/discourse/discourse/pull/42245
https://github.com/discourse/discourse/pull/42246
https://github.com/discourse/discourse/pull/42247
https://github.com/discourse/discourse/commit/234ee88a5b9b53bf938c53351eab20130323485f
https://github.com/discourse/discourse/commit/4b639a52f47fb3d46093bece9df147e4e9517a11
https://github.com/discourse/discourse/commit/a5d3b112d598242c1d1803d5a77bf98d5fdabd75
https://github.com/discourse/discourse/commit/b25a074b165253e01fc4c8911b980fc68338ea16