CVE-2025-26586
Published: 03 March 2025
Summary
CVE-2025-26586 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 Drive-by Compromise (T1189); ranked at the 45.9th 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
SI-15 directly prevents reflected XSS by requiring filtering of output to neutralize malicious scripts before rendering in the victim's browser.
SI-10 enforces validation of inputs to reject or sanitize malicious payloads that could be reflected without neutralization during web page generation.
SI-2 requires timely identification, reporting, and correction of flaws such as this XSS vulnerability in the Events Planner plugin through patching.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
The reflected XSS vulnerability enables an attacker to inject and execute arbitrary JavaScript in the victim's browser by reflecting malicious input via a crafted URL/link to the vulnerable public-facing WordPress plugin site, directly facilitating drive-by compromise where a user visits the site and the malicious script executes in their browser context.
NVD Description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in abelony Events Planner events-planner allows Reflected XSS.This issue affects Events Planner: from n/a through <= 1.3.10.
Deeper analysisAI
CVE-2025-26586 is an Improper Neutralization of Input During Web Page Generation vulnerability, classified as Reflected Cross-site Scripting (XSS) under CWE-79, in the Events Planner WordPress plugin developed by abelony. The issue affects all versions of the events-planner plugin up to and including 1.3.10, as published on 2025-03-03.
An unauthenticated remote attacker can exploit this vulnerability by crafting malicious input that is reflected without proper neutralization during web page generation, requiring user interaction such as clicking a malicious link. Successful exploitation executes arbitrary scripts in the victim's browser context within the site's scope, with 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), enabling low impacts to confidentiality, integrity, and availability due to the changed scope.
Mitigation details are available in the Patchstack advisory at https://patchstack.com/database/Wordpress/Plugin/events-planner/vulnerability/wordpress-events-planner-plugin-1-3-10-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve.
Details
- CWE(s)