CVE-2021-24482Public exploitNetwork attack vector

Stored XSS via unsanitized display settings

Published Jul 19, 2021 · Updated Aug 3, 2024

Stored XSS in Barry Kooij Related Posts for WordPress 2.0.4 and earlier allows remote authenticated users to execute script in visitors' browsers. The plugin stores heading_text and custom CSS values without sanitizing them, then renders the values in generated page content without safe output encoding. Administrator access is required to save a payload, and execution occurs when a visitor loads affected content.

CVSS severity4.8
Medium
EPSS probability0.69%
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 Barry Kooij Related Posts for WordPress 2.0.4 and earlier allows remote authenticated users to execute script in visitors' browsers. The plugin stores heading_text and custom CSS values without sanitizing them, then renders the values in generated page content without safe output encoding. Administrator access is required to save a payload, and execution occurs when a visitor loads affected content.

The record

CVE
CVE-2021-24482
Published
Jul 19, 2021
Updated
Aug 3, 2024
Vendor
Barry Kooij
Product
Related Posts for WordPress
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 19, 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 privilegesadmin

What is affected?

Barry Kooij · Related Posts for WordPressversion=2.0.4 <=2.0.4

Published CVSS scores

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

Weakness, pattern, technique

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

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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