CVE-2026-28109
Published: 05 March 2026
Summary
CVE-2026-28109 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-2026-28109 is an Improper Neutralization of Input During Web Page Generation vulnerability, classified as Reflected Cross-Site Scripting (XSS) under CWE-79, affecting the LambertGroup AllInOne Content Slider WordPress plugin (all-in-one-contentSlider). The issue impacts all versions from unknown (n/a) through 3.8 inclusive. Published on 2026-03-05, it 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 high severity due to network accessibility, low attack complexity, no required privileges, user interaction, and changed scope with low impacts on confidentiality, integrity, and availability.
Attackers can exploit this vulnerability remotely without authentication by crafting malicious input that reflects via the web page generation process, tricking users into interacting with it, such as clicking a specially crafted link. Successful exploitation executes arbitrary JavaScript in the victim's browser context, potentially leading to session hijacking, data theft, or further phishing attacks within the scope of the affected site.
Patchstack advisories document the vulnerability and provide details on affected versions; security practitioners should consult https://patchstack.com/database/Wordpress/Plugin/all-in-one-contentSlider/vulnerability/wordpress-lambertgroup-allinone-content-slider-plugin-3-8-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve for mitigation guidance, including plugin updates if available beyond version 3.8.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-9763
Vulnerability details
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LambertGroup LambertGroup - AllInOne - Content Slider all-in-one-contentSlider allows Reflected XSS.This issue affects LambertGroup - AllInOne - Content Slider: from n/a through <= 3.8.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Reflected XSS directly enables arbitrary JavaScript execution in the victim's browser via a crafted link to the public-facing vulnerable site, mapping to Drive-by Compromise (T1189) for initial client-side access and JavaScript (T1059.007) as the abused scripting interpreter for actions such as session hijacking or data theft.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Requires validation and neutralization of untrusted input before it is reflected in web page output, directly blocking the CWE-79 reflected XSS payload.
Mandates filtering or encoding of information sent to users, preventing malicious script from being executed in the victim's browser context.
Enforces information flow rules that can require sanitization or rejection of script content crossing trust boundaries in web requests.