CVE-2025-23526
Published: 03 March 2025
Summary
CVE-2025-23526 is a high-severity Cross-site Scripting (CWE-79) vulnerability in Swiftcloud Swift Calendar Online Appointment Scheduling. 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 42.7th 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).
Deeper analysis
CVE-2025-23526 is an Improper Neutralization of Input During Web Page Generation vulnerability, classified as Reflected Cross-site Scripting (XSS) under CWE-79, in the Swift Calendar Online Appointment Scheduling WordPress plugin (online-appointment-scheduling-software). This issue affects all versions from n/a through 1.3.3, as published on 2025-03-03.
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 such as clicking a malicious link. Unauthenticated attackers can exploit it by injecting malicious payloads into web pages generated by the plugin, tricking victims into executing arbitrary scripts in their browser context with changed scope, potentially compromising low levels of confidentiality, integrity, and availability.
The Patchstack advisory provides further details on this WordPress plugin vulnerability, accessible at https://patchstack.com/database/Wordpress/Plugin/online-appointment-scheduling-software/vulnerability/wordpress-swift-calendar-online-appointment-scheduling-plugin-1-3-3-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-5715
Vulnerability details
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in SwiftCloud Swift Calendar Online Appointment Scheduling online-appointment-scheduling-software allows Reflected XSS.This issue affects Swift Calendar Online Appointment Scheduling: from n/a through <= 1.3.3.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
The CVE describes a reflected XSS vulnerability in a public-facing WordPress plugin, directly enabling exploitation of public-facing applications (T1190) and allowing execution of arbitrary JavaScript in the victim's browser (T1059.007).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly mitigates the improper neutralization of input by requiring validation of user inputs to prevent injection of malicious scripts in reflected XSS attacks.
Addresses the core issue of unfiltered output during web page generation by enforcing filtering to block execution of injected scripts in the victim's browser.
Ensures timely identification, reporting, and correction of the specific software flaw in the WordPress plugin that enables the reflected XSS vulnerability.