CVE-2026-27403
Deferred Deferred - Pending Action

Cross-Site Scripting (XSS) in Hubbub Lite

Publication date: 2026-07-23

Last updated on: 2026-07-23

Assigner: Patchstack

Description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in NerdPress Hubbub Lite allows Stored XSS. This issue affects Hubbub Lite: from n/a through 1.36.3.

CVSS Scores

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Meta Information

Published
2026-07-23
Last Modified
2026-07-23
Generated
2026-08-12
AI Q&A
2026-07-23
EPSS Evaluated
2026-08-11
NVD
CVE-2026-27403
EUVD
EUVD-2026-48158

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
patchstack hubbub_lite to 1.36.3 (inc)
hubbub_lite hubbub_lite to 1.36.3 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

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Executive Summary

This is a Contributor Cross Site Scripting (XSS) vulnerability in the Hubbub Lite WordPress plugin versions 1.36.3 and below. It allows a privileged user like a Contributor to inject malicious scripts into the website. These scripts could execute when other users visit the site, potentially causing redirects or displaying unwanted advertisements.

Detection Guidance

This vulnerability requires manual inspection of the Hubbub Lite plugin versions 1.36.3 or below. Check your WordPress dashboard under Plugins to see the installed version. Look for suspicious scripts in user-generated content areas where Contributors can post, such as comments or posts.

Impact Analysis

The impact is limited but includes potential script injection that could alter website content for visitors. Since exploitation requires a Contributor to take action, the risk is lower unless your site has untrusted Contributors. The vulnerability has a CVSS score of 6.5, indicating moderate severity but low exploitability.

Compliance Impact

This vulnerability does not directly impact compliance with GDPR or HIPAA as it is a low-severity Cross Site Scripting (XSS) issue requiring user interaction and privileged access. However, if exploited, it could allow script injection that may lead to data exposure or unauthorized actions, which could indirectly affect compliance if sensitive data is compromised.

Mitigation Strategies

Immediately update the Hubbub Lite plugin to the latest version if available. If no patch exists, consider disabling the plugin temporarily or replacing it with a secure alternative. Monitor user activity for unusual scripts in posts or comments.

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