CVE-2021-47955

MEDIUM EPSS 6.9%
Published May 16, 20261mo ago · Modified Jun 17, 20262w ago
5.1 CVSS 4.0
Medium
Find Similar
Published May 16, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score
5.1
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction A
Scope X

Threat Intelligence

EPSS Exploit Probability
6.9% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

References 3

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

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.