CVE-2021-47958

MEDIUM 4.3

CouchCMS 2.2.1 Server-Side Request Forgery via SVG upload

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-918
Vendor	couchcms
Product	couchcms
Published	May 15, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Affected Versions

CouchCMS / CouchCMS

2.2.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

xxcdd