CVE-2026-28108
Published: 05 March 2026
Summary
CVE-2026-28108 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 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-2026-28108 is an Improper Neutralization of Input During Web Page Generation vulnerability, classified as Reflected Cross-site Scripting (XSS) under CWE-79, in the LambertGroup AllInOne Banner with Thumbnails WordPress plugin (all-in-one-thumbnailsBanner). This issue affects all versions from n/a through 3.8 inclusive. The vulnerability was published on 2026-03-05 and 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).
Unauthenticated attackers (PR:N) can exploit this over the network (AV:N) with low complexity (AC:L), but it requires user interaction (UI:R), such as tricking a victim into visiting a maliciously crafted URL. Exploitation reflects attacker-controlled input as executable scripts in the victim's browser, enabling low impacts on confidentiality, integrity, and availability (C:L/I:L/A:L). The changed scope (S:C) allows potential cross-origin effects, such as session hijacking or data theft within the site's context.
The primary advisory from Patchstack details this vulnerability in the WordPress plugin and is available at https://patchstack.com/database/Wordpress/Plugin/all-in-one-thumbnailsBanner/vulnerability/wordpress-lambertgroup-allinone-banner-with-thumbnails-plugin-3-8-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve. Security practitioners should review it for specific patch information, workaround recommendations, and update instructions for affected installations.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-9762
Vulnerability details
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LambertGroup LambertGroup - AllInOne - Banner with Thumbnails all-in-one-thumbnailsBanner allows Reflected XSS.This issue affects LambertGroup - AllInOne - Banner with Thumbnails: from n/a through <= 3.8.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Reflected XSS in public-facing WordPress plugin directly enables client-side JavaScript execution (T1059.007) via crafted URLs on a web application (T1190), facilitating browser session hijacking (T1185) and web session cookie theft (T1539).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires validation and neutralization of untrusted input before it is used in web page generation, blocking the reflected XSS payload in this plugin.
Requires filtering of information output to remove or encode potentially malicious script content, preventing the reflected XSS from executing in the victim's browser.
Enables monitoring of web application inputs and anomalous script execution patterns that would indicate attempted reflected XSS exploitation.