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TI-2022-06021 Aliases CVE-2022-21642

Exposure of whisper participants in discourse

Priority LOW 21CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-200.

Summary

Discourse is an open source platform for community discussion. In affected versions when composing a message from topic the composer user suggestions reveals whisper participants. The issue has been patched in stable version 2.7.13 and beta version 2.8.0.beta11. There is no workaround for this issue and users are advised to upgrade.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00751 55th percentileScored 2026-11-07
Fix Fixed discourse (discourse): 2.7.13, 2.8.0.beta11

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
discoursediscoursebefore 2.7.13; before 2.8.0.beta112.7.13, 2.8.0.beta11Patch availableCNA
  • discourse Vendordiscourse Affected before 2.7.13; before 2.8.0.beta11 Fixed in 2.7.13, 2.8.0.beta11 Patch available CNA

CPE configurations NVD · 11

CPEVersionsRoleVendor
cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*before 2.7.13Vulnerablediscourse
cpe:2.3:a:discourse:discourse:2.8.0:beta1:*:*:*:*:*:*2.8.0 beta1Vulnerablediscourse
cpe:2.3:a:discourse:discourse:2.8.0:beta10:*:*:*:*:*:*2.8.0 beta10Vulnerablediscourse
cpe:2.3:a:discourse:discourse:2.8.0:beta2:*:*:*:*:*:*2.8.0 beta2Vulnerablediscourse
cpe:2.3:a:discourse:discourse:2.8.0:beta3:*:*:*:*:*:*2.8.0 beta3Vulnerablediscourse
cpe:2.3:a:discourse:discourse:2.8.0:beta4:*:*:*:*:*:*2.8.0 beta4Vulnerablediscourse
cpe:2.3:a:discourse:discourse:2.8.0:beta5:*:*:*:*:*:*2.8.0 beta5Vulnerablediscourse
cpe:2.3:a:discourse:discourse:2.8.0:beta6:*:*:*:*:*:*2.8.0 beta6Vulnerablediscourse
cpe:2.3:a:discourse:discourse:2.8.0:beta7:*:*:*:*:*:*2.8.0 beta7Vulnerablediscourse
cpe:2.3:a:discourse:discourse:2.8.0:beta8:*:*:*:*:*:*2.8.0 beta8Vulnerablediscourse
  • cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:* Versions before 2.7.13 Vulnerable ·discourse
  • cpe:2.3:a:discourse:discourse:2.8.0:beta1:*:*:*:*:*:* Versions 2.8.0 beta1 Vulnerable ·discourse
  • cpe:2.3:a:discourse:discourse:2.8.0:beta10:*:*:*:*:*:* Versions 2.8.0 beta10 Vulnerable ·discourse
  • cpe:2.3:a:discourse:discourse:2.8.0:beta2:*:*:*:*:*:* Versions 2.8.0 beta2 Vulnerable ·discourse
  • cpe:2.3:a:discourse:discourse:2.8.0:beta3:*:*:*:*:*:* Versions 2.8.0 beta3 Vulnerable ·discourse
  • cpe:2.3:a:discourse:discourse:2.8.0:beta4:*:*:*:*:*:* Versions 2.8.0 beta4 Vulnerable ·discourse
  • cpe:2.3:a:discourse:discourse:2.8.0:beta5:*:*:*:*:*:* Versions 2.8.0 beta5 Vulnerable ·discourse
  • cpe:2.3:a:discourse:discourse:2.8.0:beta6:*:*:*:*:*:* Versions 2.8.0 beta6 Vulnerable ·discourse
  • cpe:2.3:a:discourse:discourse:2.8.0:beta7:*:*:*:*:*:* Versions 2.8.0 beta7 Vulnerable ·discourse
  • cpe:2.3:a:discourse:discourse:2.8.0:beta8:*:*:*:*:*:* Versions 2.8.0 beta8 Vulnerable ·discourse
Show 1 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:discourse:discourse:2.8.0:beta9:*:*:*:*:*:*2.8.0 beta9Vulnerablediscourse
  • cpe:2.3:a:discourse:discourse:2.8.0:beta9:*:*:*:*:*:* Versions 2.8.0 beta9 Vulnerable ·discourse

Remediation

  • Fix · CNA discourse (discourse) Fixed in 2.7.13, 2.8.0.beta11

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-21642

References

Patch 2

  • TI-2021-19656 Denial of Service in discourse CVSS 3.1MEDIUM 6.8
  • TI-2024-36150 Potential Backup file leaked via Nginx in Discourse CVSS 3.1HIGH 7.5
  • TI-2021-18002 RCE via malicious SNS subscription payload CVSS 3.1CRITICAL 10.0
  • TI-2026-24651 Discourse: Open redirect via `sso_destination_url` cookie in `enter` CVSS 4.0MEDIUM 5.1
  • TI-2026-22278 Discourse leaks private topic title and post excerpt via user action API endpoint CVSS 4.0HIGH 8.7
  • TI-2023-24152 Unauthenticated access to new private chat messages in Discourse CVSS 3.1HIGH 7.5
See all 262 →

Sources

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