WP SMTP Pro – 403 error

[AITpro Admin]

Email Question:

Hi… I’m trying to set up the Microsoft Mailer with WP SMTP Pro, and I get this 403 error.  Can you help please?

[403 GET Request: December 10, 2020 - 12:01 pm]
BPS Pro: 15
WP: 5.6
Event Code: WPADMIN-SBR
Solution: https://forum.ait-pro.com/forums/topic/security-log-event-codes/
REMOTE_ADDR: 174.5.41.49
Host Name: S010658963068b0f5.kn.shawcable.net
SERVER_PROTOCOL: HTTP/1.1
HTTP_CLIENT_IP:
HTTP_FORWARDED:
HTTP_X_FORWARDED_FOR:
HTTP_X_CLUSTER_CLIENT_IP:
REQUEST_METHOD: GET
HTTP_REFERER: https://www.example.com/wp-admin/admin.php?page=wp-mail-smtp
REQUEST_URI: /wp-admin/?error=invalid_request&error_description=AADSTS50194%3a+Application+%27aff139b5-c621-4fdd-9236-39df3f7a27c3%27(Website+Form+Mailer)+is+not+configured+as+a+multi-tenant+application.+Usage+of+the+%2fcommon+endpoint+is+not+supported+for+such+applications+created+after+%2710%2f15%2f2018%27.+Use+a+tenant-specific+endpoint+or+configure+the+application+to+be+multi-tenant.%0d%0aTrace+ID%3a+246a384e-2264-42ca-874e-05e326004e01%0d%0aCorrelation+ID%3a+48dbf3f7-d94d-42ff-8577-882696eec902%0d%0aTimestamp%3a+2020-12-10+18%3a01%3a12Z&state=ac847ff359
QUERY_STRING: error=invalid_request&error_description=AADSTS50194%3a+Application+%27aff139b5-c621-4fdd-9236-39df3f7a27c3%27(Website+Form+Mailer)+is+not+configured+as+a+multi-tenant+application.+Usage+of+the+%2fcommon+endpoint+is+not+supported+for+such+applications+created+after+%2710%2f15%2f2018%27.+Use+a+tenant-specific+endpoint+or+configure+the+application+to+be+multi-tenant.%0d%0aTrace+ID%3a+246a384e-2264-42ca-874e-05e326004e01%0d%0aCorrelation+ID%3a+48dbf3f7-d94d-42ff-8577-882696eec902%0d%0aTimestamp%3a+2020-12-10+18%3a01%3a12Z&state=ac847ff359
HTTP_USER_AGENT: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:83.0)
Gecko/20100101 Firefox/83.0

[AITpro Admin]

Solution:

These 2 security rules below are blocking the WP SMTP Pro plugin Query String Request.

RewriteCond %{QUERY_STRING} (<|>|'|%0A|%0D|%27|%3C|%3E|%00) [NC,OR]

RewriteCond %{QUERY_STRING} (;|<|>|'|"|\)|%0A|%0D|%22|%27|%3C|%3E|%00).*(/\*|union|select|insert|drop|delete|update|cast|create|char|convert|alter|declare|order|script|set|md5|benchmark|encode) [NC,OR]

Do these steps below to allow the WP SMTP Pro plugin to do what it needs to do:

1. Copy the modified wp-admin file Query String Exploits htaccess code below into this BPS wp-admin Custom Code text box: 4. CUSTOM CODE BPSQSE-check BPS QUERY STRING EXPLOITS AND FILTERS
2. Click the save wp-admin Custom Code button.
3. Go to the BPS Setup Wizard page, run the Pre-Installation Wizard and the Setup Wizard.

# BEGIN BPSQSE-check BPS QUERY STRING EXPLOITS AND FILTERS
# WORDPRESS WILL BREAK IF ALL THE BPSQSE FILTERS ARE DELETED
# Use BPS wp-admin Custom Code to modify/edit/change this code and to save it permanently.
RewriteCond %{HTTP_USER_AGENT} (%0A|%0D|%27|%3C|%3E|%00) [NC,OR]
RewriteCond %{HTTP_USER_AGENT} (;|<|>|'|"|\)|\(|%0A|%0D|%22|%27|%28|%3C|%3E|%00).*(libwww-perl|wget|python|nikto|curl|scan|java|winhttp|HTTrack|clshttp|archiver|loader|email|harvest|extract|grab|miner) [NC,OR]
RewriteCond %{THE_REQUEST} (\?|\*|%2a)+(%20+|\s+|%20+\s+|\s+%20+|\s+%20+\s+)(http|https)(:/|/) [NC,OR]
RewriteCond %{THE_REQUEST} etc/passwd [NC,OR]
RewriteCond %{THE_REQUEST} cgi-bin [NC,OR]
RewriteCond %{THE_REQUEST} (%0A|%0D) [NC,OR]
RewriteCond %{REQUEST_URI} owssvr\.dll [NC,OR]
RewriteCond %{HTTP_REFERER} (%0A|%0D|%27|%3C|%3E|%00) [NC,OR]
RewriteCond %{HTTP_REFERER} \.opendirviewer\. [NC,OR]
RewriteCond %{HTTP_REFERER} users\.skynet\.be.* [NC,OR]
RewriteCond %{QUERY_STRING} [a-zA-Z0-9_]=(http|https):// [NC,OR]
RewriteCond %{QUERY_STRING} [a-zA-Z0-9_]=(\.\.//?)+ [NC,OR]
RewriteCond %{QUERY_STRING} [a-zA-Z0-9_]=/([a-z0-9_.]//?)+ [NC,OR]
RewriteCond %{QUERY_STRING} \=PHP[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12} [NC,OR]
RewriteCond %{QUERY_STRING} (\.\./|%2e%2e%2f|%2e%2e/|\.\.%2f|%2e\.%2f|%2e\./|\.%2e%2f|\.%2e/) [NC,OR]
RewriteCond %{QUERY_STRING} ftp\: [NC,OR]
RewriteCond %{QUERY_STRING} (http|https)\: [NC,OR] 
RewriteCond %{QUERY_STRING} \=\|w\| [NC,OR]
RewriteCond %{QUERY_STRING} ^(.*)/self/(.*)$ [NC,OR]
RewriteCond %{QUERY_STRING} ^(.*)cPath=(http|https)://(.*)$ [NC,OR]
RewriteCond %{QUERY_STRING} (\<|%3C).*script.*(\>|%3E) [NC,OR]
RewriteCond %{QUERY_STRING} (<|%3C)([^s]*s)+cript.*(>|%3E) [NC,OR]
RewriteCond %{QUERY_STRING} (\<|%3C).*iframe.*(\>|%3E) [NC,OR]
RewriteCond %{QUERY_STRING} (<|%3C)([^i]*i)+frame.*(>|%3E) [NC,OR] 
RewriteCond %{QUERY_STRING} base64_encode.*\(.*\) [NC,OR]
RewriteCond %{QUERY_STRING} base64_(en|de)code[^(]*\([^)]*\) [NC,OR]
RewriteCond %{QUERY_STRING} GLOBALS(=|\[|\%[0-9A-Z]{0,2}) [OR]
RewriteCond %{QUERY_STRING} _REQUEST(=|\[|\%[0-9A-Z]{0,2}) [OR]
RewriteCond %{QUERY_STRING} ^.*(\(|\)|<|>).* [NC,OR]
RewriteCond %{QUERY_STRING} (NULL|OUTFILE|LOAD_FILE) [OR]
RewriteCond %{QUERY_STRING} (\.{1,}/)+(motd|etc|bin) [NC,OR]
RewriteCond %{QUERY_STRING} (localhost|loopback|127\.0\.0\.1) [NC,OR]
#RewriteCond %{QUERY_STRING} (<|>|'|%0A|%0D|%27|%3C|%3E|%00) [NC,OR]
RewriteCond %{QUERY_STRING} concat[^\(]*\( [NC,OR]
RewriteCond %{QUERY_STRING} union([^s]*s)+elect [NC,OR]
RewriteCond %{QUERY_STRING} union([^a]*a)+ll([^s]*s)+elect [NC,OR]
#RewriteCond %{QUERY_STRING} (;|<|>|'|"|\)|%0A|%0D|%22|%27|%3C|%3E|%00).*(/\*|union|select|insert|drop|delete|update|cast|create|char|convert|alter|declare|order|script|set|md5|benchmark|encode) [NC,OR]
RewriteCond %{QUERY_STRING} (sp_executesql) [NC]
RewriteRule ^(.*)$ - [F]
# END BPSQSE-check BPS QUERY STRING EXPLOITS AND FILTERS

[PaulZag]

WP SMTP Pro has been removed from the repository because of a unpatched XSS vulnerability.

Post SMTP Mailer/Email Log is currently #3 and no subscription required to cofigure any of it’s SMTP gateways. But Google Authentication callback get’s blocked and this doesn’t fix it. I’ll create a new post with my log.

[Author]

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