CVE-2026-32540
Published: 25 March 2026
Summary
CVE-2026-32540 is a high-severity Cross-site Scripting (CWE-79) vulnerability. Its CVSS base score is 7.1 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 11.8th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-15 (Information Output Filtering).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly mitigates reflected XSS in Bookly by filtering and encoding information outputs to neutralize malicious scripts before web page generation.
Prevents exploitation of the CVE by validating user inputs to the Bookly plugin, rejecting or sanitizing those containing executable scripts.
Addresses the specific XSS flaw in Bookly versions <=26.7 by requiring identification, prioritization, testing, and installation of patches or updates.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Reflected XSS in public-facing WordPress plugin directly enables T1190 (exploiting the vulnerable web app), T1189 (malicious links tricking users), T1059.007 (browser JS execution), and T1539 (session cookie theft via injected script).
NVD Description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Bookly Bookly bookly-responsive-appointment-booking-tool allows Reflected XSS.This issue affects Bookly: from n/a through <= 26.7.
Deeper analysisAI
CVE-2026-32540 is an Improper Neutralization of Input During Web Page Generation vulnerability, classified as Reflected Cross-site Scripting (XSS) under CWE-79, in the Bookly responsive appointment booking tool WordPress plugin. This issue affects Bookly versions from n/a through 26.7 and was published on 2026-03-25.
The vulnerability carries a CVSS v3.1 base score of 7.1 (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L), indicating network accessibility, low attack complexity, no required privileges, and user interaction. Remote attackers can exploit it by tricking authenticated or unauthenticated users into interacting with maliciously crafted inputs or links that reflect executable scripts in the browser, achieving low impacts on confidentiality, integrity, and availability within a changed scope.
Advisories, including the Patchstack database entry at https://patchstack.com/database/Wordpress/Plugin/bookly-responsive-appointment-booking-tool/vulnerability/wordpress-bookly-plugin-26-7-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve, provide further details on mitigation and patches for affected WordPress installations.
Details
- CWE(s)