Description
A vulnerability was detected in October CMS up to 4.3.4. This affects the function validateExternalImageHost of the file System/Classes/ResizeImages.php of the component SSRF Protection. The manipulation results in server-side request forgery. The attack may be launched remotely. The exploit is now public and may be used. Upgrading to version 4.3.5 is able to mitigate this issue. You should upgrade the affected component.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | October CMS | 4.3.0, 4.3.1, 4.3.2, 4.3.3, 4.3.4 | 4.3.5 |
References
- VDB-410875 | October CMS SSRF Protection ResizeImages.php validateExternalImageHost server-side request forgery vdb-entry technical-description
- VDB-410875 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- CVE-2026-101005 | CVE Analysis and Report third-party-advisory
- Submit #922294 | October CMS 4.3.4 (4.x branch, up to commit c1876c7) Server-Side Request Forgery third-party-advisory
- https://github.com/octobercms/october/security/advisories/GHSA-j2j7-7m99-6226 related
- https://github.com/0xGenesi/CVE/blob/main/October_CMS_SSRF_IPv6_Mapped_IPv4_Bypass.md exploit
- https://github.com/octobercms/october/releases/tag/v4.3.5 patch
- https://www.cybersecurity-help.cz/vdb/vulns/149488/ related