CVE-2026-27375
Published: 05 March 2026
Summary
CVE-2026-27375 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 11.8th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.
Validates web inputs to reject script-related content that could produce XSS.
Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Reflected XSS in public-facing WordPress theme directly enables arbitrary browser script execution when a victim is tricked into clicking a crafted URL (T1204.001) or visits the vulnerable site in a drive-by scenario (T1189).
NVD Description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in JanStudio Gecko gecko allows Reflected XSS.This issue affects Gecko: from n/a through <= 1.9.8.
Deeper analysisAI
CVE-2026-27375 is an Improper Neutralization of Input During Web Page Generation vulnerability, classified as Reflected Cross-site Scripting (XSS) under CWE-79, in the JanStudio Gecko WordPress theme. This issue affects Gecko theme versions from n/a through 1.9.8 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).
The vulnerability can be exploited by remote attackers requiring no privileges over the network with low attack complexity, though user interaction is necessary. Exploitation enables reflected XSS, allowing attackers to inject and execute arbitrary scripts in the context of a victim's browser when the user is tricked into interacting with a maliciously crafted request, such as clicking a link.
Mitigation guidance is provided in the Patchstack advisory at https://patchstack.com/database/Wordpress/Theme/gecko/vulnerability/wordpress-gecko-theme-1-9-8-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve.
Details
- CWE(s)