What is CVE-2026-61520?

CVE-2026-61520 is a high-severity vulnerability in Simplemachines Smf, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.7/10. Published 2026-07-14.

How severe is CVE-2026-61520?

High severity. CVSS v3 base score is 7.7 out of 10.

SSRF in Simplemachines Smf

CVE-2026-61520

Simple Machines Forum 2.1 prior to commit 4bf35cf and 3.0 prior to commit b4d23df contains a server-side request forgery vulnerability in the image proxy that allows authenticated attackers to trigger internal HTTP requests by embedding at…

Vulnerability class: SSRF (Server-Side Request Forgery)

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.

Affected products

Simplemachines Smf — versions 2.1.0, 4bf35cf9e45573a5f55a6f52995086c1da89c096, 3.0.0

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-61520?: CVE-2026-61520 is a high-severity vulnerability in Simplemachines Smf, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.7/10. Published 2026-07-14.
How severe is CVE-2026-61520?: High severity. CVSS v3 base score is 7.7 out of 10.