Security readout for executives and security teams
Plain-English summary
A Discourse invite control could fail to enforce the intended recipient or allowed email domain. A logged-in user may accept an invite they should not qualify for, potentially gaining access to restricted group content if the invite adds them to that group.
Executive priority
Treat as moderate priority where Discourse protects private customer, community, or staff discussions. Urgency is higher for sites using invites to grant restricted-group access, because the primary business impact is unintended disclosure of private content.
Technical view
CVE-2022-31096 is a CWE-281 authorization flaw in Discourse invite redemption. A logged-in user can, under certain conditions, redeem email-restricted or domain-restricted invites with a non-matching email. Impact is mainly confidentiality when restricted-group membership exposes private content.
Likely exposure
Exposed assets are Discourse instances running stable versions before 2.8.5 or beta versions before 2.9.0.beta6, especially sites using email-specific or domain-restricted invite links that add users to restricted groups.
Exploitation context
The source bundle does not show CISA KEV listing or a cited report of active exploitation. Exploitation requires a logged-in user and invite interaction, but the public summary does not fully describe the necessary conditions.
Researcher notes
Focus validation on invite acceptance authorization and group-assignment outcomes, not public unauthenticated access. The public sources state no workaround and do not provide complete trigger conditions, so version confirmation and vendor advisory review are central.
Mitigation direction
- Upgrade Discourse to a current stable release.
- Ensure stable deployments are at least 2.8.5.
- Ensure beta deployments are at least 2.9.0.beta6.
- Check Discourse advisory guidance before relying on compensating controls.
- Review restricted-group memberships created through invites.
Validation and detection
- Inventory all Discourse instances and deployed versions.
- Identify use of email-restricted or domain-restricted invite links.
- Review invite-created memberships in restricted groups.
- Confirm private categories remain limited to intended groups.
- Check vendor advisory for any newer guidance.
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-281: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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-2022-31096 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
- 5.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/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:R/S:U/C:H/I:N/A:N2.13.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.7MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/discourse/discourse/security/advisories/GHSA-rvp8-459h-282rCVE 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.
Improper Preservation of Permissions
Improper Preservation of Permissions represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.