CVE-2021-24826Public exploitNetwork attack vector

Stored XSS via unescaped custom-field shortcode output

Published Mar 7, 2022 · Updated Aug 3, 2024

Stored XSS in Eliot Akira Custom Content Shortcode before 4.0.2 allows remote authenticated users to run JavaScript via custom fields. The [field] shortcode outputs a stored custom-field value without escaping it, so script markup executes when the rendered post is viewed or previewed. Contributor access suffices before 4.0.1, while 4.0.1 requires Administrator access; execution requires a user to view the affected content.

CVSS severity5.4
Medium
EPSS probability0.60%
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 Eliot Akira Custom Content Shortcode before 4.0.2 allows remote authenticated users to run JavaScript via custom fields. The [field] shortcode outputs a stored custom-field value without escaping it, so script markup executes when the rendered post is viewed or previewed. Contributor access suffices before 4.0.1, while 4.0.1 requires Administrator access; execution requires a user to view the affected content.

The record

CVE
CVE-2021-24826
Published
Mar 7, 2022
Updated
Aug 3, 2024
Vendor
Eliot Akira
Product
Custom Content Shortcode
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 7, 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

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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=4.0.2 <4.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Eliot Akira · Custom Content Shortcodeversion=4.0.2 <4.0.2

Published CVSS scores

5.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/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 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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