CVE-2021-24920Public exploitNetwork attack vector

Admin stored XSS via unsanitized settings

Published Feb 28, 2022 · Updated Aug 3, 2024

Cross-site scripting in StatCounter – Real Time Visitor Stats, Session Replay & Heatmaps before 2.0.7 allows remote authenticated users to execute script via admin settings. The plugin stores Project ID and Secure Code values without sanitizing or escaping them before rendering administrative pages, enabling persistent script injection. Exploitation requires a high-privilege WordPress account even when unfiltered_html is disabled, and the demonstrated impact is script execution in an administrator context.

CVSS severity4.8
Medium
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in StatCounter – Real Time Visitor Stats, Session Replay & Heatmaps before 2.0.7 allows remote authenticated users to execute script via admin settings. The plugin stores Project ID and Secure Code values without sanitizing or escaping them before rendering administrative pages, enabling persistent script injection. Exploitation requires a high-privilege WordPress account even when unfiltered_html is disabled, and the demonstrated impact is script execution in an administrator context.

The record

CVE
CVE-2021-24920
Published
Feb 28, 2022
Updated
Aug 3, 2024
Vendor
StatCounter
Product
StatCounter – Real Time Visitor Stats, Session Replay & Heatmaps
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 28, 2022CVE 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=2.0.7 <2.0.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

StatCounter · StatCounter – Real Time Visitor Stats, Session Replay & Heatmapsversion=2.0.7 <2.0.7

Published CVSS scores

4.8NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
3.5NVDAV:N/AC:M/Au:S/C:N/I:P/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

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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