Medium 5.4Published May 16, 2026

CVE-2021-47955CouchCMS 2.2.1 Cross-Site Scripting via SVG File Upload

Updated under an hour ago (Oct 27, 2026, 9:50 PM ET)

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It affects CouchCMS. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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: 5.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: May 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

CouchCMS CouchCMS couchcms:couchcms (from the name)	2.2.1	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.