CVE-2022-31133Network attack vector

Stored XSS via unescaped Space names

Published Jul 7, 2022 · Updated Apr 23, 2025

Cross-site scripting in HumHub before 1.11.4 allows remote authenticated users to execute script in browsers via crafted Space names. Space-name rendering inserts administrator-controlled names into HTML confirmation and membership views without Html::encode escaping, storing payloads for later visitors. Exploitation requires permission to administer Spaces and a user to visit the affected Space; the documented impact is script execution in that user's browser.

CVSS severity5.9
Medium
EPSS probability0.69%
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 HumHub before 1.11.4 allows remote authenticated users to execute script in browsers via crafted Space names. Space-name rendering inserts administrator-controlled names into HTML confirmation and membership views without Html::encode escaping, storing payloads for later visitors. Exploitation requires permission to administer Spaces and a user to visit the affected Space; the documented impact is script execution in that user's browser.

The record

CVE
CVE-2022-31133
Published
Jul 7, 2022
Updated
Apr 23, 2025
Vendor
HumHub GmbH & Co. KG
Product
HumHub
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 7, 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=< 1.11.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

HumHub GmbH & Co. KG · HumHubversion=< 1.11.4

Published CVSS scores

5.9NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L
3.5NVDAV:N/AC:M/Au:S/C:N/I:P/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')
T1059.007Command and Scripting Interpreter: JavaScript

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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