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CVE-2026-61520: SMF 2.1.0 to before 2.1.7
CVE-2026-61520. CVSS 3.1 base score 7.7 (HIGH, Vendor/CNA). EPSS 0.00437 (percentile 0.3698), scored 24-Oct-2026.
Affected technology
SMF · 2.1.0 to before 2.1.7, b4d23dfd74a511587c605f9d294cefc3a75b4b26
SimpleMachines
Description’s affected range: prior to commit 4bf35cf and 3.0 prior to commit b4d23df
Component: Not specified by the source
Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · Low privileges required · No user interaction required
What an attacker can do
Authenticated attackers can trigger internal HTTP requests by embedding attacker-controlled URLs in BBCode image tags, which the proxy fetches without validating resolved destination IPs against private address ranges, loopback, or link-local addresses. Vendor/CNA’s CVSS 4.0 assessment (base score 6.3/10) rates confidentiality, integrity and availability impact as none.
- CWE
- CWE-918
- CCR priority
- 30.9 /100 (P4)
- CVSS 3.1
- 7.7 /10 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N · Vendor/CNA
- EPSS
- 0.00437 · percentile 0.3698 · 2026-10-24
- KEV
- no
Provenance
- NVD CVE API 2.0 · Source record · observed 2026-10-25 01:28:19.133527+00:00 UTC
Stable permalink: https://cybercodered.org/item/cve-cve-2026-61520.html