Medium 4.3Published May 15, 2026

CVE-2021-47958CouchCMS 2.2.1 Server-Side Request Forgery via SVG upload

Updated under an hour ago (Oct 27, 2026, 11:10 AM ET)

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It affects CouchCMS. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 4.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness (CWE): CWE-918
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: May 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

CouchCMS CouchCMS couchcms:couchcms (from the name)	2.2.1	CNA record

References

References

https://www.exploit-db.com/exploits/49675	exploit
https://github.com/CouchCMS/CouchCMS	product
https://www.vulncheck.com/advisories/couchcms-server-side-request-forgery-via-svg-upload	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.