CVE-2026-27353
Reflected XSS in Grand News Theme ≤ 3.4.3 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 |
|---|---|---|
| themegoods | grand_news | From 3.0.0 (inc) to 3.4.3 (inc) |
| themegoods | grand_news | to 3.4.3 (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-2026-27353 is a medium severity Cross Site Scripting (XSS) vulnerability affecting the WordPress Grand News Theme versions up to and including 3.4.3.
This vulnerability allows an attacker to inject malicious scripts—such as redirects, advertisements, or other HTML payloads—that execute when site visitors access the compromised pages.
Exploitation requires user interaction by a privileged user performing actions like clicking a malicious link, visiting a crafted page, or submitting a form.
How can this vulnerability impact me? :
If exploited, this vulnerability can lead to the execution of malicious scripts on your website, potentially causing unauthorized redirects, display of unwanted advertisements, or other harmful HTML payloads.
This can compromise the security and integrity of your website, harm user trust, and potentially lead to further attacks or data exposure.
Exploitation depends on privileged user interaction, meaning attackers need a user with certain privileges to engage with malicious content.
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-2026-27353 is a reflected Cross Site Scripting (XSS) vulnerability affecting the WordPress Grand News Theme up to version 3.4.3. Detection typically involves monitoring for suspicious input patterns or payloads in HTTP requests that could trigger script injection.
While no specific commands are provided in the available resources, common detection methods include using web application scanners or manual testing by sending crafted HTTP requests with typical XSS payloads to the affected pages and observing if the scripts execute.
- Use tools like OWASP ZAP or Burp Suite to scan for reflected XSS vulnerabilities.
- Manually test by sending HTTP requests with payloads such as <script>alert(1)</script> in URL parameters or form inputs.
- Monitor web server logs for unusual query strings or input patterns that include script tags or suspicious HTML.
What immediate steps should I take to mitigate this vulnerability?
Since no official patch is currently available for CVE-2026-27353, immediate mitigation involves applying available protective measures to block exploitation attempts.
Patchstack has issued a mitigation rule that can be applied to block attacks targeting this vulnerability until an official patch is released.
- Implement the Patchstack mitigation rule to block malicious requests exploiting the reflected XSS.
- Restrict user input and sanitize all inputs on affected pages to prevent script injection.
- Educate privileged users to avoid clicking suspicious links or submitting untrusted forms.
- Monitor web traffic for signs of attempted exploitation and respond accordingly.