CVE-2025-23653

High

Published: 14 February 2025

Published

14 February 2025

Modified

23 April 2026

KEV Added

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Patch

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CVSS Score v3.1 7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

EPSS Score 0.0011 29.3th percentile

Risk Priority 14 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-23653 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 Spearphishing Link (T1566.002); ranked at the 29.3th 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-2025-23653 is an Improper Neutralization of Input During Web Page Generation vulnerability, classified as Reflected Cross-site Scripting (XSS) under CWE-79, in the WordPress plugin Form To Online Booking (cf7-calendly-integration) by Nabeel Tahir. The issue affects all versions of the plugin from unknown initial release through 1.0 inclusive. Published on 2025-02-14, it 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 high severity due to network accessibility and scope change.

Attackers can exploit this vulnerability remotely over the network with low attack complexity and no required privileges, though it demands user interaction such as visiting a maliciously crafted link or page. Exploitation enables injection of arbitrary scripts into reflected web pages, potentially compromising the victim's browser session. This yields low impacts on confidentiality (e.g., session token theft), integrity (e.g., page modification), and availability, amplified by the changed scope to the user's context.

Patchstack provides details on this vulnerability, including mitigation guidance, in their advisory at https://patchstack.com/database/Wordpress/Plugin/cf7-calendly-integration/vulnerability/wordpress-form-to-online-booking-plugin-1-0-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve. Security practitioners should check for plugin updates or apply recommended workarounds as specified there.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2025-3317

Vulnerability details

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Nabeel Tahir Form To Online Booking cf7-calendly-integration allows Reflected XSS.This issue affects Form To Online Booking: from n/a through <= 1.0.

CWE(s): CWE-79

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1566.002 Spearphishing Link Initial Access

Adversaries may send spearphishing emails with a malicious link in an attempt to gain access to victim systems.

attack.mitre.org →

Why these techniques?

Reflected XSS vulnerability requires user interaction via a maliciously crafted link to inject and execute arbitrary scripts in the browser, directly enabling/facilitating spearphishing link attacks for session compromise.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1