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CVE-2021-47958

CouchCMS 2.2.1 Server-Side Request Forgery via SVG upload

MEDIUM
4.3
CVSS Score
Published: May 15, 2026 at 06:36 PM UTC
Updated: June 17, 2026 at 04:18 AM UTC
1 product affected across 1 vendorCouchCMS

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.2%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

Exploit
Source: cverecord
https://www.exploit-db.com/exploits/49675
Product
Source: cverecord
https://github.com/CouchCMS/CouchCMS
Third Party Advisory
Source: cverecord
https://www.vulncheck.com/advisories/couchcms-server-side-request-forgery-via-svg-upload

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-918

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