CVE-2022-41944Network attack vector

Topic-title disclosure via missing notification access filtering

Published Nov 28, 2022 · Updated Apr 23, 2025

Improper authorization in Discourse before 2.8.12 and beta versions before 2.9.0.beta13 allows remote authenticated users to read topic titles. The notifications controller serialized notification records without filtering topic IDs through guardian.can_see_topic_ids, exposing titles after access was revoked. A valid account, an existing notification, and subsequent loss of topic access are required; exposure is limited to notification metadata such as the topic title.

CVSS severity3.5
Low
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in Discourse before 2.8.12 and beta versions before 2.9.0.beta13 allows remote authenticated users to read topic titles. The notifications controller serialized notification records without filtering topic IDs through guardian.can_see_topic_ids, exposing titles after access was revoked. A valid account, an existing notification, and subsequent loss of topic access are required; exposure is limited to notification metadata such as the topic title.

The record

CVE
CVE-2022-41944
Published
Nov 28, 2022
Updated
Apr 23, 2025
Vendor
Discourse
Product
Discourse
Classifications
CWE-200, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 28, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.8.12
  2. Affected versionversion=>= 2.9.0.beta0, < 2.9.0.beta13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Discourse · Discourseversion=< 2.8.12; version=>= 2.9.0.beta0, < 2.9.0.beta13

Published CVSS scores

3.5GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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