CVE-2026-22438
Published: 05 March 2026
Summary
CVE-2026-22438 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 14.4th 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-2026-22438 is an Improper Neutralization of Input During Web Page Generation vulnerability, classified as Reflected Cross-site Scripting (XSS) under CWE-79, in the WordPress theme TheBi developed by foreverpinetree. The issue affects TheBi versions from n/a through 1.0.5 and was published on 2026-03-05.
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, user interaction needed, and changed scope with low impacts to confidentiality, integrity, and availability. Remote attackers can exploit it by tricking authenticated or unauthenticated users into interacting with maliciously crafted links or inputs reflected in web pages, potentially executing arbitrary scripts in the victim's browser context.
Patchstack's advisory at https://patchstack.com/database/Wordpress/Theme/thebi/vulnerability/wordpress-thebi-theme-1-0-5-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve documents the reflected XSS in TheBi theme version 1.0.5, recommending mitigation through theme updates where available.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-9564
Vulnerability details
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in foreverpinetree TheBi thebi allows Reflected XSS.This issue affects TheBi: from n/a through <= 1.0.5.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Reflected XSS enables drive-by compromise by allowing arbitrary script execution via crafted malicious links that victims are tricked into visiting.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires validation and sanitization of all web inputs to block the reflected XSS payload before it is inserted into generated pages.
Requires filtering of all outputs so that untrusted reflected data cannot execute scripts in the victim's browser context.
Mandates prompt application of the vendor patch that removes the improper-neutralization flaw in TheBi versions <= 1.0.5.