CVE-2021-39497

eyoucms 1.5.4 lacks sanitization of input data, allowing an attacker to inject a url to trigger blind SSRF via the saveRemote() function

published September 7, 2021

CVSS
—
EPSS
2%
Percentile
83.6
In the wild
Unconfirmed
What it is

⚠️ A simple oversight in eyoucms opens the door to blind SSRF attacks through unvalidated input — like a restaurant that takes your order without ever checking the menu! 🔥 Think of it as a waiter who doesn’t verify your request for an off-menu item, potentially leading to some wild surprises in your meal. In this case, the saveRemote() function is like that waiter, letting anything slip through without a second glance! This vulnerability allows attackers to craft malicious URLs, which could lead to unauthorized access to internal resources. Imagine a malicious user sending a request that retrieves sensitive information from your internal systems, all while remaining undetected!

Put simply

Think of it as a waiter who doesn’t verify your request for an off-menu item, potentially leading to some wild surprises in your meal. In this case, the saveRemote() function is like that waiter, letting anything slip through without a second glance! The eyoucms 1.5.4 lacks proper input sanitization in the saveRemote() function, enabling an attacker to inject a URL and trigger a blind Server-Side Request Forgery (SSRF) attack, with minimal effort.

What to do

This vulnerability allows attackers to craft malicious URLs, which could lead to unauthorized access to internal resources. Imagine a malicious user sending a request that retrieves sensitive information from your internal systems, all while remaining undetected! To mitigate this vulnerability, immediately update eyoucms to the latest version to ensure input validation is in place. Additionally, review your input handling mechanisms and implement strict sanitization checks on all user inputs. You can tackle this! By following these steps, you'll fortify your system against these sneaky attacks. 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.02358 · 83.6th percentile
Published
2021-09-07T19:57Z
EPSS history
Timeline
  • 07 SEP 19:57Z
    eyoucms 1.5.4 lacks sanitization of input data, allowing an attacker to inject a url to trigger blind SSRF via the saveRemote() function
    cvelistv5