CVE-2021-47873

HIGH

VestaCP < 0.9.8-25 - Stored Cross-Site Scripting via v_interface Parameter

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-47873. PoCs published by numan türle.

AI-analyzed exploit summary This is a functional proof-of-concept for a stored XSS vulnerability in VestaCP 0.9.8, where the 'v_interface' parameter is injected with a malicious script. The exploit demonstrates how an attacker can inject JavaScript code that will be stored and executed in the context of the application.

Description

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.

Exploits (1)

exploitdb WORKING POC VERIFIED
by numan türle · textwebappsmultiple
https://www.exploit-db.com/exploits/49662

This is a functional proof-of-concept for a stored XSS vulnerability in VestaCP 0.9.8, where the 'v_interface' parameter is injected with a malicious script. The exploit demonstrates how an attacker can inject JavaScript code that will be stored and executed in the context of the application.

Classification
Working Poc 95%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: VestaCP < 0.9.8-26
Auth required
Prerequisites: Valid session cookie (PHPSESSID) · Access to the VestaCP admin interface
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (4)

Core 4
Core References
Exploit, Third Party Advisory exploit
https://www.exploit-db.com/exploits/49662
Various Sources product
https://vestacp.com
Various Sources product
https://myvestacp.com

Scores

CVSS v3 7.2
EPSS 0.0019
EPSS Percentile 9.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (1)
VestaCP/VestaCP 0.9.8 - 0.9.8-25
Published Jan 21, 2026
Tracked Since Feb 18, 2026