Security readout for executives and security teams
Plain-English summary
Discourse moderators could see administrator-only sensitive data in staff action logs. This may expose webhook secrets, API key details, private messages, restricted category information, and private chat titles. The main business risk is confidentiality loss and possible abuse of leaked integration secrets. Discourse has patched the issue in named versions.
Executive priority
Prioritize upgrade during the next security maintenance window, faster if moderators are contractors, community volunteers, or otherwise not fully trusted. The issue is not described as publicly exploitable without privileges, but leaked secrets and private content can create downstream business risk.
Technical view
CVE-2026-24742 is an improper authorization issue in Discourse staff action logs. A non-admin moderator can access log entries containing sensitive administrator-level information. Affected versions are before 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0. CVSS is 6.5 with network access, low complexity, low privileges, no user interaction, and high confidentiality impact.
Likely exposure
Exposure is limited to Discourse instances where untrusted or compromised moderator accounts exist. Public anonymous users are not described as able to exploit this issue.
Exploitation context
No active exploitation is indicated in the provided sources, and the CVE is not marked KEV. Abuse requires moderator-level access, but the exposed data may help compromise connected services if webhook secrets or API key details are leaked.
Researcher notes
The core weakness is CWE-863 improper authorization. The advisory describes sensitive staff action log entries visible to non-admin moderators. Evidence does not include exploit code, public exploitation, or a configuration workaround. Validate by version and role model rather than external scanning alone.
Mitigation direction
- Upgrade Discourse to 3.5.4, 2025.11.2, 2025.12.1, 2026.1.0, or later.
- Review moderator appointments and limit the role to fully trusted users.
- Follow Discourse guidance for handling any secrets or API details potentially exposed in logs.
- Do not rely on configuration changes; sources state no configuration-based workaround exists.
Validation and detection
- Inventory all Discourse instances and compare versions against the affected ranges.
- Review current moderator accounts and confirm they are trusted and necessary.
- Check staff action log access expectations after upgrading.
- Assess whether exposed webhook secrets, API key details, or private content require incident response review.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-863: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-24742 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N2.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/discourse/discourse/security/advisories/GHSA-hwjv-9gqj-m7h6CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Incorrect Authorization
Incorrect Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.