CVE-2026-72725

Discourse: Stored XSS in staff action logs injects staff UI

MEDIUM
5.4
CVSS Score
Published: August 10, 2026 at 04:02 PM UTC
Updated: September 8, 2026 at 09:09 PM UTC
1 product affected across 1 vendorDiscourse

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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

Discourse is an open-source discussion platform. Prior to 2026.1.6, the staff action log model rendered unescaped previous and new value fields that could inject stored cross-site scripting into the staff interface. The issue is fixed in 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 2026.1.6v < 2026.5.2v < 2026.6.1
Affected range stops below 2026.1.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 2026.5.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 2026.6.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-79

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