CVE-2026-27375
Reflected XSS in JanStudio Gecko ≤ 1.9.8 Allows Code Injection
Publication date: 2026-03-05
Last updated on: 2026-03-09
Assigner: Patchstack
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| janstudio | gecko | From 1.0.0 (inc) to 1.9.8 (inc) |
| janstudio | gecko | to 1.9.8 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CVE-2026-27375 is a medium priority Cross Site Scripting (XSS) vulnerability affecting the WordPress Gecko Theme versions up to and including 1.9.8.
This vulnerability allows an attacker to inject malicious scripts—such as redirects, advertisements, or other HTML payloads—that execute when visitors access the compromised website.
It is classified under OWASP Top 10 A3: Injection and involves improper neutralization of input during web page generation, specifically a reflected XSS.
Exploitation requires user interaction by a privileged user, such as clicking a malicious link, visiting a crafted page, or submitting a form, although the initial attack vector can be initiated by an unauthenticated user.
How can this vulnerability impact me? :
This vulnerability can impact you by allowing attackers to execute malicious scripts on your website, which can lead to unauthorized redirects, display of unwanted advertisements, or other harmful HTML payloads.
Such attacks can compromise the security and integrity of your website, potentially harming your users by stealing sensitive information or performing actions on their behalf.
Since the attack requires user interaction, users might be tricked into clicking malicious links or submitting crafted forms, increasing the risk of exploitation.
No official patch is currently available, but mitigation rules exist to block attacks targeting this vulnerability.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
CVE-2026-27375 is a reflected Cross Site Scripting (XSS) vulnerability affecting the WordPress Gecko Theme up to version 1.9.8. Detection typically involves monitoring for suspicious input that is improperly neutralized and reflected in web pages.
While no specific detection commands are provided, common approaches include using web vulnerability scanners that test for reflected XSS by injecting typical XSS payloads into URL parameters or form inputs and observing if they are executed.
Additionally, monitoring web server logs for unusual query strings or payloads that contain script tags or suspicious HTML can help identify attempts to exploit this vulnerability.
What immediate steps should I take to mitigate this vulnerability?
There is currently no official patch available for CVE-2026-27375.
Patchstack has issued a mitigation rule to block attacks targeting this vulnerability, which users are advised to apply immediately to protect their sites.
As an immediate step, apply the Patchstack mitigation rule to block malicious payloads attempting to exploit the reflected XSS vulnerability.
Additionally, consider restricting user input, implementing web application firewalls (WAFs), and educating privileged users to avoid clicking suspicious links or submitting untrusted forms.