CVE-2026-27403 MEDIUM

CVE-2026-27403: WordPress Hubbub Lite plugin <= 1.36.3 - Cross Site Scripting (XSS) vulnerability

Vendor Nerdpress

Product Hubbub Lite

Weakness CWE-79 · XSS

Published July 23, 2026

Last update July 23, 2026

View on NVD All CVEs

CVSS base score

6.5/10

Attack vector Network

Attack complexity Low

Privileges required Low

User interaction Required

Confidentiality Low

Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L

What the vulnerability does

01Description

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.

Explanation of Vulnerability in Simple Terms

02Summary

Hubbub Lite versions up to 1.36.3 contain a cross-site scripting (XSS) vulnerability that allows an authenticated attacker to inject malicious scripts. The vulnerability requires user interaction and can affect other users or the site itself. Update to a version newer than 1.36.3 to resolve this issue.

What an attacker can do

03Attacker Capabilities

Inject malicious scripts that execute in other users' browsers or affect site functionality.

Potential impact on your site

04Site Impact

Authenticated users could be compromised, session tokens stolen, or site content defaced via injected scripts.

Conditions required to exploit

05Prerequisites

Attacker must have a low-level account and trick a user into visiting a malicious link or page.

Key dates

06Disclosure timeline

July 23, 2026 CVE published

July 23, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-27403 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/79.html AskarLabs — CWE-79 write-up Cross-Site Scripting

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