CVE-2021-47958

medium

Description

CouchCMS 2.2.1 contains a server-side request forgery vulnerability that allows authenticated attackers to make arbitrary HTTP requests by uploading malicious SVG files. Attackers can upload SVG files containing external entity references through the browse.php endpoint to access internal services and resources.

References

https://www.vulncheck.com/advisories/couchcms-server-side-request-forgery-via-svg-upload

https://www.exploit-db.com/exploits/49675

https://github.com/CouchCMS/CouchCMS

Details

Source: Mitre, NVD

Published: 2026-05-15

Updated: 2026-05-18

Risk Information

CVSS v2

Base Score: 4

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 4.3

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Severity: Medium

CVSS v4

Base Score: 5.3

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L

Severity: Medium

EPSS

EPSS: 0.00025