Cisco Webex Flaw: Hackers Hacked Meetings in 2025

-
Cisco Webex Flaw: Hackers Hacked Meetings in 2025

Cisco Webex Flaw: Hackers Hacked Meetings in 2025

In April 2025, a scary cybersecurity problem hit Cisco Webex, a video meeting app used by millions for school, work, and fun. Hackers found a flaw, called CVE-2025-20236, that let them take over someone’s computer just by sending a fake meeting link. This article explains what happened, how hackers used this trick, and how you can stay safe online, all in a way that’s easy to understand, even for an 11-year-old.

What Was the Cisco Webex Vulnerability?

The Cisco Webex vulnerability was a serious bug in the app’s custom URL parser, the part that handles web links for joining meetings. This flaw let hackers create fake Webex meeting links that looked real but were actually dangerous. When someone clicked one, the app didn’t check the link properly and allowed harmful code to run on the user’s computer. This is called a remote code execution (RCE) attack, which means hackers could control the computer from far away.

Here’s a simple way to think about it:

  • A hacker makes a fake Webex link, like “join-meeting.webex.com/12345”.
  • You get an email or message with the link and think it’s from a friend or teacher.
  • When you click it, the Webex app opens and secretly downloads a bad file.
  • That file runs commands to steal your data, lock your files, or spy on you.

This bug was extra dangerous because it didn’t need you to type a password or install anything. One click was enough to cause big problems.

How Did Hackers Find This Bug?

On April 17, 2025, tech news sites like BleepingComputer reported that Cisco had found this flaw during their own security tests. The bug, labeled CVE-2025-20236, had a high severity score of 8.8 out of 10, meaning it was a big deal. Cybersecurity experts warned that hackers might start using it soon, especially since Webex is so popular. Cisco quickly released a patch (a software fix) on April 18, 2025, and told everyone to update their Webex app right away.

[](https://www.bleepingcomputer.com/news/security/cisco-webex-bug-lets-hackers-gain-code-execution-via-meeting-links/)[](https://candid.technology/cisco-webex-cve-2025-20236-patch/)

Luckily, Cisco’s team said they didn’t see hackers using this bug in real attacks before the fix was out. But once the news spread, hackers might have tried to target people who hadn’t updated yet.

How Does the Exploit Work? A JavaScript Example

To make this easier to understand, let’s pretend the Webex bug involved a JavaScript trick (in reality, it was more complex, but this example simplifies it). JavaScript is a coding language that makes websites and apps do cool things, but hackers can use it for bad stuff too. Here’s an example of what a hacker’s fake link might do:

Let’s break down what this code does:

  • The

Popular posts from this blog

[pwncollege] Path Traversal 1 write-up

-
Image
Exploiting Path Traversal Vulnerabilities: A Step-by-Step Guide Exploiting Path Traversal Vulnerabilities: A Step-by-Step Guide Introduction Path traversal is a common web vulnerability that allows attackers to access files outside the intended directory. In this guide, we'll explore how to exploit and prevent this vulnerability using a real-world example. The Challenge The challenge involves a Flask-based web server that serves files from the /challenge/files directory. The server is vulnerable to path traversal due to improper handling of user input in the URL path. Server Code #!/opt/pwn.college/python import flask import os app = flask.Flask(__name__) @app.route("/files", methods=["GET"]) @app.route("/files/ ", methods=["GET"]) def challenge(path="index.html"): requested_path = app.root_path + "/files/" + path ...
Read more

OPERATION PHOENIX: The 2025 Exchange Server Cyber Holocaust | TS//SCI Briefing

-
OPERATION PHOENIX: The 2025 Exchange Server Cyber Holocaust | TS//SCI Briefing OPERATION PHOENIX: The 2025 Exchange Server Cyber Holocaust 🔴 CRISIS ALERT (TL:BLACK) - Active exploitation of CVE-2025-12345 has compromised: • 72,419 Exchange servers globally • 43 Fortune 500 enterprises • 5.1TB/hour data exfiltration Technical Autopsy: The Quantum Kill Chain POST /ecp/DDI/DDIService.svc/GetObject HTTP/1.1 Host: %TARGET% Content-Type: application/json; charset=utf-8 X-Requested-With: XMLHttpRequest { "__type":"ExchangeSerializedObject:#Microsoft.Exchange.Data.ApplicationLogic", "Object":"AAEAAAD/////AQAAAAAAAAAEAQAAAB9TeXN0ZW0uV2ViLlVJLldlYkNvbnRyb2xzLlZlcnNpb24C", "Properties":{ "@Object":"AAEAAAD/////AQAAAAAAAAAMAgAAABdNaWNyb3NvZnQuRXhjaGFuZ2UuVkI2AQAAAAROYW1lAQYAAABWYWx1ZQIAAAAL", ...
Read more

Europol Unveils Russian-Backed Cyber Sabotage: A Deep Dive into Hybrid Threats

-
Cybersecurity Chronicles Europol Unveils Russian-Backed Cyber Sabotage: A Deep Dive into Hybrid Threats In a recent disclosure, Europol has highlighted a concerning surge in politically motivated cyber-attacks and sabotage within the European Union (EU), orchestrated by Russian state actors in collaboration with organized criminal networks. This development underscores the evolving landscape of cyber threats, where traditional crime converges with state-sponsored activities to destabilize societies. The Nexus of State Actors and Organized Crime Europol's report reveals that "hybrid threat" actors are forming alliances with organized criminal gangs to execute a range of destabilizing activities. These include sabotage, arson, cyber-attacks, data theft, migrant smuggling, and other criminal endeavors. Such collaborations aim to undermine democratic processes, social cohesion...
Read more