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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Active

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact Low

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
CouchCMS CouchCMS affected
Version Status Constraints
2.2.1 affected —

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Project Subscriptions

Vendors Products
Couchcms Subscribe
Couchcms Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/CouchCMS/CouchCMS cve-icon cve-icon
https://www.exploit-db.com/exploits/49636 cve-icon cve-icon
https://www.vulncheck.com/advisories/couchcms-cross-site-scripting-via-svg-file-upload cve-icon cve-icon
History

Sat, 16 May 2026 15:45:00 +0000

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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-05-16T15:26:07.851Z

Reserved: 2026-02-01T11:24:18.720Z

Link: CVE-2021-47955

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-05-16T16:16:21.780

Modified: 2026-05-16T16:16:21.780

Link: CVE-2021-47955

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses