CVE-2026-35573Public exploitNetwork attack vector

Administrator RCE via unsanitized backup filename

Published Apr 7, 2026 · Updated Apr 7, 2026

Path traversal in ChurchCRM before 6.5.3 allows remote authenticated users with administrator access to execute code via backup restore. RestoreJob.php concatenates the uploaded filename directly with the backup directory and moves the file without sanitizing path elements or restricting dangerous file types. Administrator access permits placement of an Apache .htaccess file followed by a PHP web shell, yielding code execution with web-server privileges.

CVSS severity9.1
Critical
EPSS probability0.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in ChurchCRM before 6.5.3 allows remote authenticated users with administrator access to execute code via backup restore. RestoreJob.php concatenates the uploaded filename directly with the backup directory and moves the file without sanitizing path elements or restricting dangerous file types. Administrator access permits placement of an Apache .htaccess file followed by a PHP web shell, yielding code execution with web-server privileges.

The record

CVE
CVE-2026-35573
Published
Apr 7, 2026
Updated
Apr 7, 2026
Vendor
ChurchCRM
Product
ChurchCRM
Classifications
CWE-434, CWE-22, T1505.003
Attack vector
network
Privileges
admin

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 privilegesadmin

What is affected?

ChurchCRM · ChurchCRMversion=< 6.5.3

Published CVSS scores

9.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1505.003Web Shell

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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