XSS in Vestacp
CVE-2021-47873
VestaCP versions prior to 0.9.8-25 contain a cross-site scripting vulnerability in the IP interface configuration that allows attackers to inject malicious scripts. Attackers can exploit the 'v_interface' parameter by sending a crafted POST request to the add/ip/ endpoint with a stored XSS payload.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (11.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 11.7% 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
- Vestacp — versions 0.9.8
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/49662 (exploit)
- vestacp.com (product)
- myvestacp.com (product)
- www.vulncheck.com/advisories/vestacp-stored-cross-site-scripting (third-party-advisory)
Frequently asked questions
- What is CVE-2021-47873?
- CVE-2021-47873 is a high-severity vulnerability in Vestacp, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-01-21.
- How severe is CVE-2021-47873?
- High severity. CVSS v3 base score is 7.2 out of 10.