CVE-2026-35575Public exploitNetwork attack vector

Administrator session hijacking via stored group-name script

Published Apr 7, 2026 · Updated Apr 7, 2026

Stored XSS in ChurchCRM before 6.5.3 allows remote authenticated users with group-creation privileges to hijack administrator sessions. The group-creation feature stores a crafted group name and renders it without effective neutralization, causing embedded JavaScript to run when an administrator views the page. Exploitation requires group-creation privileges and an administrator to view the affected page; the script can read the non-HttpOnly session cookie and assume the administrator session.

CVSS severity8.0
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in ChurchCRM before 6.5.3 allows remote authenticated users with group-creation privileges to hijack administrator sessions. The group-creation feature stores a crafted group name and renders it without effective neutralization, causing embedded JavaScript to run when an administrator views the page. Exploitation requires group-creation privileges and an administrator to view the affected page; the script can read the non-HttpOnly session cookie and assume the administrator session.

The record

CVE
CVE-2026-35575
Published
Apr 7, 2026
Updated
Apr 7, 2026
Vendor
ChurchCRM
Product
ChurchCRM
Classifications
CWE-1004, CWE-79, T1539
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 2026Record 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=< 6.5.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ChurchCRM · ChurchCRMversion=< 6.5.3

Published CVSS scores

8.0GitHub, Inc.CVSS:3.1/AV:N/AC:L/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.

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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 exploitPublished

Weakness, pattern, technique

CWE-1004Sensitive Cookie Without 'HttpOnly' Flag
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1539Steal Web Session Cookie

Public exploit references

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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