CVE-2021-47955

MEDIUM 5.4

CouchCMS 2.2.1 Cross-Site Scripting via SVG File Upload

CVSS Score

5.4

EPSS Score

0.0%

EPSS Percentile

0th

CouchCMS 2.2.1 contains a cross-site scripting vulnerability that allows authenticated attackers to execute arbitrary JavaScript by uploading malicious SVG files through the file upload functionality. Attackers can upload SVG files containing embedded script tags to the browse.php endpoint, which are then executed in users' browsers when the files are accessed or previewed.

CWE	CWE-79
Vendor	couchcms
Product	couchcms
Published	May 16, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

None

Integrity

None

Availability

None

Affected Versions

CouchCMS / CouchCMS

2.2.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

exploit-db.com: https://www.exploit-db.com/exploits/49636 github.com: https://github.com/CouchCMS/CouchCMS vulncheck.com: https://www.vulncheck.com/advisories/couchcms-cross-site-scripting-via-svg-file-upload

Credits

xxcdd