Security readout for executives and security teams
Plain-English summary
A narrow Discourse build range could show private-message titles and participant names to people who should not see them. The message contents were not exposed. The issue matters most for organizations running Discourse from the tests-passed branch during the affected commit window.
Executive priority
Treat as high priority only for Discourse instances tracking tests-passed near the affected commits. The business risk is confidentiality loss of sensitive conversation titles and participant names, not full private-message disclosure.
Technical view
Affected Discourse tests-passed commits from ddb4583 up to before 27bad28 exposed private-message title and participant metadata to unauthorized users when a private message included a group. Post-level access control remained intact. The issue is CWE-200 with CVSS 3.1 score 7.5.
Likely exposure
Exposure appears limited to Discourse deployments tracking the tests-passed branch at the affected commit range. Stable release exposure is not stated in the provided sources. Sites not running that branch or commit window are less likely affected.
Exploitation context
The bundle does not identify active exploitation, and KEV status is false. The CVSS vector indicates network-reachable, low-complexity exposure without privileges or user interaction, but the described leak is limited to private-message metadata, not message body content.
Researcher notes
The public record names a short-lived problematic commit that was reverted about 32 minutes later. Evidence is specific to tests-passed commit bounds. Do not assume broader product versions, exploit availability, or additional fixes beyond the advisory and revert commit.
Mitigation direction
- Upgrade to the latest Discourse commit if running the tests-passed branch.
- Confirm the deployed commit is not between ddb4583 and 27bad28.
- Follow Discourse advisory guidance for any environment-specific remediation.
- Review access-sensitive private-message metadata created during the affected window.
Validation and detection
- Inventory Discourse deployments and identify branch and commit provenance.
- Check whether any instance tracked tests-passed during the affected commit window.
- Verify private-message posts remained access-controlled in application testing.
- Review logs or reports for unexpected inbox visibility of private-message metadata.
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-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. 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-2021-41082 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
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/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:N/UI:N/S:U/C:H/I:N/A:N3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/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-vm3x-w6jm-j9vvCVE reference · x_refsource_CONFIRM
- https://github.com/discourse/discourse/commit/27bad28c530c89acab35a56b945b6a3924280f4bCVE reference · x_refsource_MISC
- https://github.com/discourse/discourse/commit/ddb458343dc39a7a8c99467dcd809b444514fe2cCVE reference · x_refsource_MISC
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.
Exposure of Sensitive Information to an Unauthorized Actor
Exposure of Sensitive Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.