CVE-2025-64442Network attack vector

Cross-site scripting via unencoded search preview fields

Published Nov 7, 2025 · Updated Nov 7, 2025

Cross-site scripting in HumHub before 1.17.4 allows remote attackers to execute script in a user's browser through Meta-Search previews. The metaSearchProvider.php view renders each result's getTitle() and getDescription() values without HTML encoding, allowing crafted result metadata to become markup. The attack requires a user to view a poisoned search preview; the script runs in the HumHub origin and can read or alter data available to that user's session.

CVSS severity6.1
Medium
EPSS probability0.23%
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 1.17.4 allows remote attackers to execute script in a user's browser through Meta-Search previews. The metaSearchProvider.php view renders each result's getTitle() and getDescription() values without HTML encoding, allowing crafted result metadata to become markup. The attack requires a user to view a poisoned search preview; the script runs in the HumHub origin and can read or alter data available to that user's session.

The record

CVE
CVE-2025-64442
Published
Nov 7, 2025
Updated
Nov 7, 2025
Vendor
HumHub GmbH & Co. KG
Product
HumHub
Classifications
CWE-79
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 7, 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=< 1.17.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HumHub GmbH & Co. KG · HumHubversion=< 1.17.4

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
7.1GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA: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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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