CVE-2022-39232Network attack vector

Browser page crash via missing quote title

Published Sep 29, 2022 · Updated Apr 23, 2025

Improper input validation in Discourse 2.9.0.beta5 through 2.9.0.beta9 allows remote authenticated users to crash a topic page. The PostCooked quote handler dereferences a missing title element when an incomplete quote references a nonexistent post or topic, causing a JavaScript exception. Posting privileges are required, and the effect is limited to crashing the current browser page when affected content is viewed.

CVSS severity6.5
Medium
EPSS probability1.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Discourse 2.9.0.beta5 through 2.9.0.beta9 allows remote authenticated users to crash a topic page. The PostCooked quote handler dereferences a missing title element when an incomplete quote references a nonexistent post or topic, causing a JavaScript exception. Posting privileges are required, and the effect is limited to crashing the current browser page when affected content is viewed.

The record

CVE
CVE-2022-39232
Published
Sep 29, 2022
Updated
Apr 23, 2025
Vendor
Discourse
Product
Discourse
Classifications
CWE-20, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 29, 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=>= 2.9.0.beta5, < 2.9.0.beta10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Discourse · Discourseversion=>= 2.9.0.beta5, < 2.9.0.beta10

Published CVSS scores

6.5GitHub_MCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499.004Application or System Exploitation

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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