Trustwave Rapid Response: CrowdStrike Falcon Outage Update. Learn More

Trustwave Rapid Response: CrowdStrike Falcon Outage Update. Learn More

Managed Detection & Response

Eliminate active threats with 24/7 threat detection, investigation, and response.

Co-Managed SOC (SIEM)

Maximize your SIEM investment, stop alert fatigue, and enhance your team with hybrid security operations support.

Advisory & Diagnostics

Advance your cybersecurity program and get expert guidance where you need it most.

Penetration Testing

Test your physical locations and IT infrastructure to shore up weaknesses before exploitation.

Database Security

Prevent unauthorized access and exceed compliance requirements.

Email Security

Stop email threats others miss and secure your organization against the #1 ransomware attack vector.

Digital Forensics & Incident Response

Prepare for the inevitable with 24/7 global breach response in-region and available on-site.

Firewall & Technology Management

Mitigate risk of a cyberattack with 24/7 incident and health monitoring and the latest threat intelligence.

Offensive Security
Solutions to maximize your security ROI
Microsoft Exchange Server Attacks
Stay protected against emerging threats
Rapidly Secure New Environments
Security for rapid response situations
Securing the Cloud
Safely navigate and stay protected
Securing the IoT Landscape
Test, monitor and secure network objects
Why Trustwave
About Us
Awards and Accolades
Trustwave SpiderLabs Team
Trustwave Fusion Security Operations Platform
Trustwave Security Colony
Technology Alliance Partners
Key alliances who align and support our ecosystem of security offerings
Trustwave PartnerOne Program
Join forces with Trustwave to protect against the most advance cybersecurity threats
SpiderLabs Blog

[Honeypot Alert] Wordpress Wp Symposium 14.11 - Unauthenticated Shell Upload Exploit Attempt

10975_a23cf4d7-421c-4bf0-a21a-3d4c631df0deOur web honeypots picked up some exploit attempts for the recently released vulnerability in the WP Symposium Plugin. WP Symposium is described as:

WP Symposium is a plugin for WordPress, that will turn a WordPress site into a Social Network. And you can choose which features you want to activate, and customise them to achieve your social network features.

Uses of WP Symposium are limited only by your imagination, but some examples of how people are already using it include:

  • Social networks for those who live or work together (colleges, clubs, etc…).
  • Internal "intranet"s for a business or company.
  • Dating sites, including those for niche groups of people.
  • A social network supporting products and services.
  • A social network for particular hobbies/interests (music, films, etc…).


Wordpress WP Symposium 14.11 Shell Upload Vulnerability

WP Symposium allows the user to upload different types of files and it has a pre-configured list of allowed extensions:


These restrictions are applied to the /wp-symposium/server/file_upload_form.php page, however, there are other pages that are not protected such as:

  • /wp-symposium/server/php/index.php
  • /wp-symposium/server/php/UploadHandler.php
  • /wp-symposium/mobile-files/server/php/index.php
  • /wp-symposium/mobile-files/server/php/UploadHandler.php

Exploit-DB has a vulnerability entry with Proof of Concept Python exploit code:



Honeypot Exploit Attempt

Here is an example exploit attempt that was captured by ModSecurity WAF:

[24/Dec/2014:20:05:21 --0600] VJtw4cCo8AoAADHxgygAAAAF 50576 XXX.XXX.XXX.XXX 80
POST /wp-content/plugins/wp-symposium/server/php/index.php HTTP/1.1
Host: honeypot
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Firefox/24.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive
Content-Type: multipart/form-data; boundary=---------------------------259392320121592
Content-Length: 92562--f29bb312-I--
4,91960,"_privacy.php","<Unknown ContentType>"

The attacker attempted to upload a PHP file called "_privacy.php". This file has various PHP backdoor code which allows the attacker to send HTTP commands through request variables. It also contains a version of the WSO web shell:



Action Items

Update WP Symposium

If you can not update, then you need to manually update the UploadHandler.php script. Update the following line from this -

// Defines which files (based on their names) are accepted for upload:
'accept_file_types' => '/.+$/i',

To this -

// Defines which files (based on their names) are accepted for upload:
'accept_file_types' => '/.(mp4|doc|docx|ppt|pptx|xls|xlsx|txt|pdf|gif|jpe?g|png)$/i',
Use a Web Application Firewall (WAF)

Both of Trustwave's WAF products (TW WAF and ModSecurity) can protect your sites from PHP file uploads.

Latest SpiderLabs Blogs

Trustwave Rapid Response: CrowdStrike Falcon Outage Update

Trustwave is proactively assessing and monitoring our clients who may have been impacted by CrowdStrike’s recently rolled-out update for its Windows users. The critical issue identified with...

Read More

Using AWS Secrets Manager and Lambda Function to Store, Rotate and Secure Keys

When working with Amazon Web Services (AWS), we often find that various AWS services need to store and manage secrets. AWS Secrets Manager is the go-to solution for this. It's a centralized service...

Read More

Facebook Malvertising Epidemic – Unraveling a Persistent Threat: SYS01

The Trustwave SpiderLabs Threat Intelligence team's ongoing study into how threat actors use Facebook for malicious activity has uncovered a new version of the SYS01 stealer. This stealer is designed...

Read More