CVE-2022-46148Network attack vector

Cross-site scripting via malicious composer drafts

Published Nov 29, 2022 · Updated Apr 23, 2025

Cross-site scripting in Discourse 2.8.10 and earlier allows remote authenticated users to execute script through a crafted composer message. The vendor advisory identifies the composer message and drafts page as the input and trigger but does not disclose the rendering sink or missing neutralization operation. The user must create the malicious draft and revisit the drafts page; site-wide XSS requires the default Content Security Policy to be modified or disabled, and 2.9.0.beta1 through 2.9.0.beta11 is also affected.

CVSS severity7.1
High
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Discourse 2.8.10 and earlier allows remote authenticated users to execute script through a crafted composer message. The vendor advisory identifies the composer message and drafts page as the input and trigger but does not disclose the rendering sink or missing neutralization operation. The user must create the malicious draft and revisit the drafts page; site-wide XSS requires the default Content Security Policy to be modified or disabled, and 2.9.0.beta1 through 2.9.0.beta11 is also affected.

The record

CVE
CVE-2022-46148
Published
Nov 29, 2022
Updated
Apr 23, 2025
Vendor
Discourse
Product
Discourse
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 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=<= 2.8.10
  2. Affected versionversion=>= 2.9.0.beta1, <= 2.9.0.beta11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Discourse · Discourseversion=<= 2.8.10; version=>= 2.9.0.beta1, <= 2.9.0.beta11

Published CVSS scores

7.1GitHubCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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