CVE-2026-23697Public exploitNetwork attack vector

Authenticated PHP execution via omitted .phar denylist

Published Jul 7, 2026 · Updated Jul 7, 2026

Unrestricted file upload in Vtiger CRM before 8.4.0 allows remote authenticated users to execute PHP code through the Documents module. Its extension denylist omits .phar, preserving attacker-supplied PHP archives in the web-accessible storage directory, while Apache 2.2 access-control syntax in .htaccess is ignored by Apache 2.4. A low-privileged account and an Apache deployment that executes .phar files are required; subsequent unauthenticated requests can run the stored payload.

CVSS severity8.7
High
EPSS probability1.00%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Vtiger CRM before 8.4.0 allows remote authenticated users to execute PHP code through the Documents module. Its extension denylist omits .phar, preserving attacker-supplied PHP archives in the web-accessible storage directory, while Apache 2.2 access-control syntax in .htaccess is ignored by Apache 2.4. A low-privileged account and an Apache deployment that executes .phar files are required; subsequent unauthenticated requests can run the stored payload.

The record

CVE
CVE-2026-23697
Published
Jul 7, 2026
Updated
Jul 7, 2026
Vendor
Vtiger
Product
Vtiger CRM
Classifications
CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 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=0 <=8.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Vtiger · Vtiger CRMversion=0 <=8.3.0

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/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.

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 exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

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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