CVE-2021-24438Public exploitNetwork attack vector

Administrator-context script execution via unescaped ga_action attribute

Published Aug 30, 2021 · Updated Aug 3, 2024

Reflected XSS in ShareThis Dashboard for Google Analytics before 2.5.2 allows remote attackers to execute script in an administrator's browser. The stats view writes the unsanitized ga_action parameter into an HTML attribute, allowing crafted input to break out and create executable markup. The plugin must be connected to Google Analytics, and a logged-in administrator must open the crafted admin-page URL; execution is limited to that browser context.

CVSS severity6.1
Medium
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in ShareThis Dashboard for Google Analytics before 2.5.2 allows remote attackers to execute script in an administrator's browser. The stats view writes the unsanitized ga_action parameter into an HTML attribute, allowing crafted input to break out and create executable markup. The plugin must be connected to Google Analytics, and a logged-in administrator must open the crafted admin-page URL; execution is limited to that browser context.

The record

CVE
CVE-2021-24438
Published
Aug 30, 2021
Updated
Aug 3, 2024
Vendor
Simple Share Buttons
Product
ShareThis Dashboard for Google Analytics
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 30, 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=2.5.2 <2.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Simple Share Buttons · ShareThis Dashboard for Google Analyticsversion=2.5.2 <2.5.2

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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