October CMS SSRF Protection ResizeImages.php validateExternalImageHost server-side request forgery
10Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.9
exploitation probability
—
observed exploitation
nono source reports it
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
Affected products
n/a · October CMSReferences
https://github.com/0xGenesi/CVE/blob/main/October_CMS_SSRF_IPv6_Mapped_IPv4_Bypass.mdhttps://github.com/octobercms/october/releases/tag/v4.3.5https://github.com/octobercms/october/security/advisories/GHSA-j2j7-7m99-6226https://vuldb.com/cve/CVE-2026-101005https://vuldb.com/submit/922294https://vuldb.com/vuln/410875https://vuldb.com/vuln/410875/ctihttps://www.cybersecurity-help.cz/vdb/vulns/149488/