CVE-2021-47955

CouchCMS 2.2.1 Cross-Site Scripting via SVG File Upload

Published May 16, 2026 CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title CouchCMS 2.2.1 Cross-Site Scripting via SVG File Upload
First Time appeared Couchcms
Couchcms couchcms
Weaknesses CWE-79
CPEs cpe:2.3:a:couchcms:couchcms:1.3.5:*:*:*:*:*:*:*
cpe:2.3:a:couchcms:couchcms:1.4.5:*:*:*:*:*:*:*
cpe:2.3:a:couchcms:couchcms:1.4.7:*:*:*:*:*:*:*
cpe:2.3:a:couchcms:couchcms:1.4:*:*:*:*:*:*:*
cpe:2.3:a:couchcms:couchcms:2.0:*:*:*:*:*:*:*
cpe:2.3:a:couchcms:couchcms:2.1:*:*:*:*:*:*:*
cpe:2.3:a:couchcms:couchcms:2.2.1:*:*:*:*:*:*:*
cpe:2.3:a:couchcms:couchcms:2.2:*:*:*:*:*:*:*
cpe:2.3:a:couchcms:couchcms:2.3:*:*:*:*:*:*:*
Vendors & Products Couchcms
Couchcms couchcms
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 5.1, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
May 24, 2026, 1:37 AM
Reserved
Feb 1, 2026, 11:24 AM
Status
Deferred
Published
May 16, 2026, 4:16 PM
Modified
Jun 17, 2026, 4:18 AM