October CMS up to 4.3.4 SSRF Protection ResizeImages.php validateExternalImageHost server-side request forgery

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k1.84+

Summaryinfo

A vulnerability has been found in October CMS up to 4.3.4 and classified as critical. This vulnerability affects the function validateExternalImageHost of the file System/Classes/ResizeImages.php of the component SSRF Protection. This manipulation causes server-side request forgery. This vulnerability is registered as CVE-2026-101005. Remote exploitation of the attack is possible. Furthermore, an exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in October CMS up to 4.3.4. It has been declared as critical. Affected by this vulnerability is the function validateExternalImageHost of the file System/Classes/ResizeImages.php of the component SSRF Protection. The manipulation with an unknown input leads to a server-side request forgery vulnerability. The CWE definition for the vulnerability is CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. As an impact it is known to affect confidentiality, integrity, and availability.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-101005. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known.

It is possible to download the exploit at github.com. It is declared as proof-of-concept. By approaching the search of inurl:System/Classes/ResizeImages.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 4.3.5 eliminates this vulnerability. The upgrade is hosted for download at github.com.

Additional details are provided at cybersecurity-help.cz. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Server-side request forgery
CWE: CWE-918
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Google Hack: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: October CMS 4.3.5

Timelineinfo

09/27/2026 Advisory disclosed
09/27/2026 +0 days VulDB entry created
09/27/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: GHSA-j2j7-7m99-6226
Status: Confirmed

CVE: CVE-2026-101005 (🔒)
GCVE (CVE): GCVE-0-2026-101005
GCVE (VulDB): GCVE-100-410875
scip Labs: https://www.scip.ch/en/?labs.20161013
Misc.: 🔒

Entryinfo

Created: 09/27/2026 12:46
Changes: 09/27/2026 12:46 (60), 09/27/2026 12:47 (1)
Complete: 🔍
Submitter: chenhuanlin
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #922294: October CMS 4.3.4 (4.x branch, up to commit c1876c7) Server-Side Request Forgery (by chenhuanlin)

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