EUVD-2026-60235Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
PR:L required as exploitation demands an authenticated category moderator role; C:L reflects excerpt-only confidentiality exposure with no integrity or availability impact.
Primary rating from Vendor (github).
CVSS VectorVendor: github
Lifecycle Timeline
3DescriptionCVE.org
Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.1, on sites with category group moderation enabled, the review queue could include an excerpt (and permalink) of the private message attached to a flag, even when the reviewing category moderator was not a participant in that message. These notify_moderators flag messages are addressed only to moderators and, for core flags, to a category's moderation groups as they existed when the flag was raised, so a category group moderator could read flag-discussion content they were not authorized to see. This affects official plugins that create such messages and core flags raised before a moderator's group was granted moderation of the category. Only the confidentiality of a limited excerpt of these flag-related private messages is affected; no content can be modified or deleted. This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.1.
AnalysisAI
Unauthorized private message excerpt exposure in Discourse allows authenticated category group moderators to read flag-related companion PM content they were never intended to access, via the review queue API. Affected are Discourse deployments with category group moderation enabled running versions prior to 2026.1.6, 2026.5.2, 2026.6.1, or 2026.7.1. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | All of the following conditions must be simultaneously true: the Discourse instance must have the enable_category_group_moderation site setting explicitly enabled by an administrator (this is not the default configuration); the attacker must be an authenticated user holding a category group moderator role (PR:L - neither anonymous visitors nor standard members qualify); and the review queue must contain flagged items whose companion private messages were not addressed to the attacker's moderation group, which occurs for core flags raised before the group was granted category moderation or for flags using the notify_moderators subtype directed solely at global moderators. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.3 Medium score with vector AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N accurately reflects the constrained impact of this issue. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade Discourse to one of the vendor-patched releases: 2026.1.6, 2026.5.2, 2026.6.1, or 2026.7.1, as documented in GitHub security advisory GHSA-wmc6-pmxp-xw5w and implemented across commits 4df0e54, 58e45dc, 74c8522, and e56bd3e (PR #41527 at https://github.com/discourse/discourse/pull/41527). … Detailed patch versions, workarounds, and compensating controls in full report. |
Threat intelligence, references, and detailed analysis are available after sign-in.
Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
View allShare
External POC / Exploit Code
Leaving vuln.today