CVE-2025-55796CWE-400denial-of-service

CVE-2025-55796

High · published November 18, 2025

CVSS v3.1
7.5
EPSS
1%
Percentile
49.8
In the wild
Unconfirmed
What it is

⚡ A predictable token system is the villain here! This vulnerability in openml.org allows remote attackers to brute-force critical user workflows like password resets and account confirmations. 🔥 Think of it like a restaurant giving out reservation codes based solely on the time you called — if your friend knows when you called, they can guess your code and snag your table! An attacker could easily take over a user’s account by obtaining valid tokens within a short timeframe, leading to unauthorized access, account hijacking, or even tampering with personal information. The potential for chaos is absolutely devastating!

Put simply

Think of it like a restaurant giving out reservation codes based solely on the time you called — if your friend knows when you called, they can guess your code and snag your table! This vulnerability stems from using predictable MD5-based tokens generated from timestamps, lacking user-specific data or cryptographic randomness, making them susceptible to brute-force attacks.

What to do

An attacker could easily take over a user’s account by obtaining valid tokens within a short timeframe, leading to unauthorized access, account hijacking, or even tampering with personal information. The potential for chaos is absolutely devastating! Immediately patch to a version that incorporates secure token generation, ideally using a combination of user-specific data and robust randomness. Review your token management processes to prevent future predictability issues! You've got this! By taking these steps, you're not just solving a problem; you're becoming a security hero! 🛡️

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00634 · 49.8th percentile
Weakness
CWE-400 · Uncontrolled Resource Consumption
Published
2025-11-18T22:16Z
Affected products (1)
ProductVersionsFixed in
openml/openml_frontend< 2.0.202511112.0.20251111
References (3)
EPSS history
Timeline
  • 18 NOV 00:00Z
    The openml/openml.org web application version v2.0.20241110 uses predictable MD5-based tokens for critical user workflows such as signup confirmation, password…
    cvelistv5