CVEvulnerability

CVE-2026-55424

7.4 HIGH Published 2026-07-09 Modified 2026-07-14 Official page ↗
Status
Analyzed
Published
2026-07-09
Last modified
2026-07-14
Assigner
[email protected]
CVSS 4.0 ([email protected])
7.4 HIGH — 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
CVSS 3.1 ([email protected])
5.4 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weaknesses
CWE-79

Description

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.

Affected configurations

• discourse discourse (>= 2026.1.0 < 2026.1.5) • discourse discourse (>= 2026.4.0 < 2026.4.2) • discourse discourse (>= 2026.5.0 < 2026.5.1) • discourse discourse 2026.6.0

Related

Weakness · CWE (1)

  • CWE-79 Improper Neutralization of Input During Web Page Generation weakness

References