CVE-2022-41938Network attack vector

Stored XSS via unsafe discussion-title rendering

Published Nov 19, 2022 · Updated Apr 23, 2025

Stored cross-site scripting in Flarum 1.5.0 through 1.6.1 allows remote authenticated users to execute script via discussion titles. Application.tsx parsed the computed title through an element's innerHTML, while app.blade.php rendered the server-side title with unescaped output. An account able to create or rename a discussion must supply the title, and a victim must open that discussion before the injected markup executes.

CVSS severity9.0
Critical
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in Flarum 1.5.0 through 1.6.1 allows remote authenticated users to execute script via discussion titles. Application.tsx parsed the computed title through an element's innerHTML, while app.blade.php rendered the server-side title with unescaped output. An account able to create or rename a discussion must supply the title, and a victim must open that discussion before the injected markup executes.

The record

CVE
CVE-2022-41938
Published
Nov 19, 2022
Updated
Apr 23, 2025
Vendor
Flarum
Product
Flarum
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 19, 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=>= 1.5.0, < 1.6.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Flarum · Flarumversion=>= 1.5.0, < 1.6.2

Published CVSS scores

9.0GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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 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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