XSS in Opensolution Quick.cms
CVE-2021-47981
Quick.CMS 6.7 contains a cross-site scripting vulnerability in the sliders form that allows authenticated attackers to inject malicious scripts by submitting XSS payloads through the sDescription parameter. Attackers can craft CSRF forms targeting the admin.php?p=sliders-form endpoint to execute arbitrary JavaScript in victim browsers when the form is submitted.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (6.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 6.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Opensolution Quick.cms — versions 6.7
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/50530 (exploit)
- opensolution.org/ (product)
- opensolution.org/download/home.html (product)
- www.vulncheck.com/advisories/quick-cms-cross-site-scripting-via-csrf-to-sliders… (third-party-advisory)
Frequently asked questions
- What is CVE-2021-47981?
- CVE-2021-47981 is a medium-severity vulnerability in Opensolution Quick.cms, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-05-16.
- How severe is CVE-2021-47981?
- Medium severity. CVSS v3 base score is 5.4 out of 10.