7.4

CVE-2026-55424

Discourse: Topic featured link susceptible to stored XSS

Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, a topic "featured link" was not sufficiently normalized and escaped before being rendered in the topic list, allowing a user who can set a featured link to inject JavaScript when default Content Security Policy protections were modified or disabled. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Discourse ≫ Discourse Version >= 2026.1.0 < 2026.1.5
Discourse ≫ Discourse Version >= 2026.4.0 < 2026.4.2
Discourse ≫ Discourse Version >= 2026.5.0 < 2026.5.1
Discourse ≫ Discourse Version2026.6.0 SwEditionlatest
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% 0.222
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 5.4 2.3 2.7
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
security-advisories@github.com 7.4 0 0
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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/releases/tag/v2026.1.5
Release Notes
https://github.com/discourse/discourse/releases/tag/v2026.4.2
Release Notes
https://github.com/discourse/discourse/releases/tag/v2026.5.1
Release Notes
https://github.com/discourse/discourse/releases/tag/v2026.6.0
Release Notes
https://github.com/discourse/discourse/security/advisories/GHSA-695w-7fv8-mxg3
Vendor Advisory
https://github.com/discourse/discourse/commit/1bce8881e4253d9bbab56f011a12ef899b926b59
Patch
https://github.com/discourse/discourse/commit/6679d9a5083488bae10c2adbb345c481c583242c
Patch
https://github.com/discourse/discourse/commit/6828aee9b15c2655d63b515ac919830bd540ff83
Patch
https://github.com/discourse/discourse/commit/c9b9405f5bd0bf0269e505e28e3aad388d7657c5
Patch