CVE-2025-24599

High

Published: 04 February 2025

Published

04 February 2025

Modified

23 April 2026

KEV Added

—

Patch

—

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 0.0013 32.1th percentile

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

Summary

CVE-2025-24599 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 Exploitation for Client Execution (T1203); ranked at the 32.1th 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-2025-24599 is an Improper Neutralization of Input During Web Page Generation vulnerability, classified as Reflected Cross-site Scripting (XSS) under CWE-79, in the Tribulant Software Newsletters newsletters-lite WordPress plugin. This issue affects all versions of the plugin from n/a through 4.9.9.6, as published on 2025-02-04.

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 exploitation is possible over the network with low attack complexity, no required privileges, but necessitating user interaction such as clicking a malicious link. Remote attackers can deliver payloads reflected in web pages, potentially leading to limited impacts on confidentiality, integrity, and availability within a changed scope, such as session hijacking or data theft for interacting users.

Mitigation details are available in the Patchstack advisory at https://patchstack.com/database/Wordpress/Plugin/newsletters-lite/vulnerability/wordpress-newsletters-plugin-4-9-9-6-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2025-3803

Vulnerability details

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Tribulant Software Newsletters newsletters-lite allows Reflected XSS.This issue affects Newsletters: from n/a through <= 4.9.9.6.

CWE(s): CWE-79

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1203 Exploitation for Client Execution Execution

Adversaries may exploit software vulnerabilities in client applications to execute code.

attack.mitre.org →

T1204.001 Malicious Link Execution

An adversary may rely upon a user clicking a malicious link in order to gain execution.

attack.mitre.org →

Why these techniques?

Reflected XSS in public-facing WordPress plugin enables client-side JS execution in browser via crafted malicious link requiring user click, directly matching exploitation for client execution and user execution via malicious link.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0