CVE-2025-49046
Published: 22 January 2026
Summary
CVE-2025-49046 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 20.3th 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-2025-49046 is an Improper Neutralization of Input During Web Page Generation vulnerability, classified as Reflected Cross-site Scripting (XSS, CWE-79), in the top_bar_promoter component of the LambertGroup xPromoter WordPress plugin. It affects all versions of xPromoter up to and including 1.3.4. The vulnerability has 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 its network accessibility, low attack complexity, lack of required privileges, and scope change upon successful exploitation.
Remote attackers without authentication can exploit this vulnerability by injecting malicious scripts into user-controlled input that is reflected back in the generated web page without proper neutralization. Exploitation requires user interaction, such as a victim clicking a crafted link or visiting a malicious site. Successful attacks allow script execution in the victim's browser context, potentially leading to low-level impacts on confidentiality (e.g., session token theft), integrity (e.g., data modification), and availability (e.g., denial of service via resource consumption), with the changed scope enabling broader effects on the site.
The Patchstack advisory at https://patchstack.com/database/Wordpress/Plugin/top_bar_promoter/vulnerability/wordpress-xpromoter-plugin-1-3-4-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve provides details on this WordPress xPromoter plugin vulnerability in version 1.3.4, including recommended mitigations such as updating to a patched version if available or applying input sanitization workarounds. Security practitioners should review the full advisory for plugin-specific remediation steps.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-4084
Vulnerability details
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LambertGroup xPromoter top_bar_promoter allows Reflected XSS.This issue affects xPromoter: from n/a through <= 1.3.4.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Reflected XSS in public-facing WordPress plugin directly enables T1190 exploitation for client-side JS execution (T1059.007) via crafted input reflected without sanitization.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires validation and sanitization of untrusted input before it is used in web page generation, preventing the reflected XSS payload from being executed.
Requires filtering or encoding of information output to users, neutralizing script content that would otherwise be reflected in the top_bar_promoter response.
Provides mechanisms to detect and block malicious code (scripts) delivered via web requests or responses, limiting exploitation of the input neutralization flaw.