CVE-2021-24173Network attack vector

Stored XSS via CSRF-unprotected option updates

Published Apr 5, 2021 · Updated Aug 3, 2024

Cross-site request forgery in Vinmatrix VM Backups 1.0 and earlier allows remote attackers to store script code via plugin options. The plugin options update path performs no CSRF check before accepting attacker-controlled option changes, which persist as stored script content. Exploitation requires a logged-in WordPress user to load an attacker-controlled request; the stored payload then executes in later browser sessions.

CVSS severity6.1
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Cross-site request forgery in Vinmatrix VM Backups 1.0 and earlier allows remote attackers to store script code via plugin options. The plugin options update path performs no CSRF check before accepting attacker-controlled option changes, which persist as stored script content. Exploitation requires a logged-in WordPress user to load an attacker-controlled request; the stored payload then executes in later browser sessions.

The record

CVE
CVE-2021-24173
Published
Apr 5, 2021
Updated
Aug 3, 2024
Vendor
Vinmatrix
Product
VM Backups
Classifications
CWE-352, CAPEC-62, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 5, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=1.0 <=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Vinmatrix · VM Backupsversion=1.0 <=1.0

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A: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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
CAPEC-62Cross Site Request Forgery
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo