CVE-2021-24305Public exploitNetwork attack vector

Unauthenticated stored XSS via unsanitized license key

Published May 24, 2021 · Updated Aug 3, 2024

Stored XSS in Target First Plugin 2.0 allows remote attackers to inject script through an unauthenticated license-key update. The plugin accepts weeWzKey in a POST to any site URL, saves it as the weeID option without sanitization, and interpolates that option into a script URL in every page footer. When a user visits an affected site page, the injected script executes in the visitor's browser and can act with that visitor's web-session privileges.

CVSS severity6.1
Medium
EPSS probability1.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Target First Plugin 2.0 allows remote attackers to inject script through an unauthenticated license-key update. The plugin accepts weeWzKey in a POST to any site URL, saves it as the weeID option without sanitization, and interpolates that option into a script URL in every page footer. When a user visits an affected site page, the injected script executes in the visitor's browser and can act with that visitor's web-session privileges.

The record

CVE
CVE-2021-24305
Published
May 24, 2021
Updated
Aug 3, 2024
Vendor
Target First
Product
Target First Plugin
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 24, 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

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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=2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Target First · Target First Pluginversion=2.0

Published CVSS scores

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

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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