CVE-2021-24883Network attack vector

Stored script execution via unescaped popup fields

Published Nov 29, 2021 · Updated Aug 3, 2024

Stored cross-site scripting in Essential Plugin Popup Anything before 2.0.4 allows remote authenticated users to run script via popup fields. The plugin stores Link Text and Button Text values and renders them in popup output without escaping, so attacker-supplied markup executes in a visitor's browser. Contributor-level access is required to create the malicious popup, and a user must view the affected output; the bounded consequence is script execution in that user's WordPress origin.

CVSS severity5.4
Medium
EPSS probability0.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in Essential Plugin Popup Anything before 2.0.4 allows remote authenticated users to run script via popup fields. The plugin stores Link Text and Button Text values and renders them in popup output without escaping, so attacker-supplied markup executes in a visitor's browser. Contributor-level access is required to create the malicious popup, and a user must view the affected output; the bounded consequence is script execution in that user's WordPress origin.

The record

CVE
CVE-2021-24883
Published
Nov 29, 2021
Updated
Aug 3, 2024
Vendor
Essential Plugin
Product
Popup Anything
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 29, 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=2.0.4 <2.0.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Essential Plugin · Popup Anythingversion=2.0.4 <2.0.4

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5NIST NVDAV: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 exploitUnconfirmed

Weakness, pattern, technique

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

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

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Your stack

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