CVE-2021-47873Public exploitNetwork attack vectorHinoki check available

Stored XSS via unsanitized interface parameter

Published Jan 21, 2026 · Updated Jan 21, 2026

Stored XSS in Vesta Control Panel 0.9.8 through 0.9.8-25 allows remote authenticated users to execute script via IP interface data. The add/ip/ handler accepts v_interface from a POST request and stores it in IP configuration without neutralizing script markup. A valid panel session and request token are required to submit the payload, which executes when stored interface data is rendered in a browser.

CVSS severity5.1
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stored XSS in Vesta Control Panel 0.9.8 through 0.9.8-25 allows remote authenticated users to execute script via IP interface data. The add/ip/ handler accepts v_interface from a POST request and stores it in IP configuration without neutralizing script markup. A valid panel session and request token are required to submit the payload, which executes when stored interface data is rendered in a browser.

The record

CVE
CVE-2021-47873
Published
Jan 21, 2026
Updated
Jan 21, 2026
Vendor
Vesta Control Panel
Product
Vesta Control Panel
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.9.8 <=0.9.8-25

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Vesta Control Panel · Vesta Control Panelversion=0.9.8 <=0.9.8-25

Published CVSS scores

7.2VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
5.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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