CVE-2020-26282CWE-74

Template Injection in BrowserUp Proxy

Critical · published December 24, 2020

CVSS v3.1
10.0
EPSS
5%
Percentile
92.0
In the wild
Unconfirmed
What it is

🚨 A sneaky Server-Side Template Injection lets attackers run arbitrary code without breaking a sweat — it’s like leaving the front door wide open and inviting trouble! 🔥 Think of BrowserUp Proxy as a café where customers can request custom dishes. If the chef doesn’t check the orders properly, a mischievous customer could slip in a recipe for disaster, cooking up something entirely unwanted! An attacker could waltz right in and take control of the server, manipulating data, stealing sensitive information, and executing anything they desire — the potential for chaos is absolutely devastating! This vulnerability can compromise the integrity of your applications, leading to data breaches and significant reputational damage.

Put simply

Think of BrowserUp Proxy as a café where customers can request custom dishes. If the chef doesn’t check the orders properly, a mischievous customer could slip in a recipe for disaster, cooking up something entirely unwanted! CVE-2020-26282 is a critical Server-Side Template Injection flaw in BrowserUp Proxy that allows attackers to inject arbitrary Java EL expressions, enabling unauthenticated Remote Code Execution. This means attackers can execute code on the server as if they have full access.

What to do

An attacker could waltz right in and take control of the server, manipulating data, stealing sensitive information, and executing anything they desire — the potential for chaos is absolutely devastating! This vulnerability can compromise the integrity of your applications, leading to data breaches and significant reputational damage. To protect yourself, immediately upgrade to BrowserUp Proxy version 2.1.2 or later. Ensure your environment is secure by auditing your proxy server configurations and implementing strict input validation. You've got this! Patch up and lock down your server, and you'll be a security hero in no time! 🛡️

The record
Technical detail
CVSS v3.1
10.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.04829 · 92.0th percentile
Weakness
CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Published
2020-12-24T20:45Z
EPSS history
Timeline
  • 24 DEC 20:45Z
    Template Injection in BrowserUp Proxy
    cvelistv5