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Transposh <= 1.0.7 “tp_tp” Unauthenticated Reflected Cross-Site Scripting

Jul 22, 2022 · By Julien Ahrens

ADVISORY INFORMATION

CREDITS

This vulnerability was discovered and researched by Julien Ahrens from RCE Security.

VERSIONS AFFECTED

Transposh WordPress Translation 1.0.7 and below

INTRODUCTION

Transposh translation filter for WordPress offers a unique approach to blog translation. It allows your blog to combine automatic translation with human translation aided by your users with an easy to use in-context interface.

(from the vendor’s homepage)

VULNERABILITY DETAILS

The plugin’s ajax action “tp_tp” is vulnerable to an unauthenticated/authenticated reflected Cross-Site Scripting vulnerability when user-supplied input to the HTTP GET parameter “q” is processed by the web application. Since the application does not properly validate and sanitize this parameter, it is possible to place arbitrary script code onto the same page.

This offers a wide range of possible attacks such as redirecting the user to a malicious page, spoofing content on the page or attacking the browser and its plugins. Since all session-relevant cookies are protected by HTTPOnly, it is not possible to hijack sessions.

PROOF OF CONCEPT

The following PoC triggers a JavaScript alert:

http://[host]/wp-admin/admin-ajax.php?action=tp_tp&e=g&m=s&tl=en&q=<img%20src%3dx%20onerror%3dalert(document.cookie)>

SOLUTION

Update to Transposh 1.0.8.1

REPORT TIMELINE

  • 2021-08-19: Discovery of the vulnerability
  • 2021-08-20: Contacted the vendor via their contact form
  • 2021-08-20: Vendor response
  • 2021-08-20: Sent all the PoC exploits
  • 2021-08-20: Vendor acknowledges the issues
  • 2021-09-14: Requested status update from vendor
  • 2021-10-07: No response from vendor, requested status update again
  • 2021-10-25: CVE requested from WPScan (CNA)
  • 2021-10-27: WPScan assigns CVE-2021-24910
  • 2022-02-22: Vendor releases 1.0.8 which fixes this vulnerability
  • 2022-07-22: Public disclosure

REFERENCES