CVE-2026-2986Public exploitNetwork attack vector

Stored XSS via unescaped post class attributes

Published Apr 18, 2026 · Updated Apr 18, 2026

Stored XSS in Contextual Related Posts 4.2.1 and earlier allows remote authenticated users to execute scripts through other_attributes. The rendering path passes the stored other_attributes value into post_class() output without context-appropriate attribute escaping. Contributor-level access is required to store the payload; the script then runs in browsers that render an affected page.

CVSS severity6.4
Medium
EPSS probability0.30%
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 Contextual Related Posts 4.2.1 and earlier allows remote authenticated users to execute scripts through other_attributes. The rendering path passes the stored other_attributes value into post_class() output without context-appropriate attribute escaping. Contributor-level access is required to store the payload; the script then runs in browsers that render an affected page.

The record

CVE
CVE-2026-2986
Published
Apr 18, 2026
Updated
Apr 18, 2026
Vendor
Ajay D'Souza
Product
Contextual Related Posts
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 18, 2026Record 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=0 <=4.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Ajay D'Souza · Contextual Related Postsversion=0 <=4.2.1

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/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.

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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/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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