CVE-2023-40765

User enumeration is found in PHPJabbers Event Booking Calendar v4.0

published August 28, 2023

CVSS
—
EPSS
1%
Percentile
59.0
In the wild
Unconfirmed
What it is

⚠️ A little miscommunication can lead to big problems! In PHPJabbers Event Booking Calendar v4.0, password recovery messages give away whether a user is valid — a gift-wrapped hint for attackers. 🎁 Think of it like a customer service desk that announces, 'Sorry, we don’t have a reservation for you,' while quietly confirming another guest's booking. This kind of public chat allows eavesdroppers to figure out who’s who! If attackers can figure out valid usernames, they can unleash a brute force attack, trying passwords until they find the right one. This could lead to unauthorized access, exposing sensitive user data and compromising the integrity of your system. That's absolutely devastating!

Put simply

Think of it like a customer service desk that announces, 'Sorry, we don’t have a reservation for you,' while quietly confirming another guest's booking. This kind of public chat allows eavesdroppers to figure out who’s who! The user enumeration vulnerability in PHPJabbers Event Booking Calendar allows attackers to distinguish between valid and invalid accounts based on differing response messages during password recovery. This provides a foothold for brute force exploits against valid accounts.

What to do

If attackers can figure out valid usernames, they can unleash a brute force attack, trying passwords until they find the right one. This could lead to unauthorized access, exposing sensitive user data and compromising the integrity of your system. That's absolutely devastating! To mitigate this issue, implement uniform error messages that do not disclose valid usernames during the password recovery process. Additionally, consider rate-limiting login attempts and employing CAPTCHA to thwart automated attacks. Don't leave your user data vulnerable! You can tackle this! Fix those messages and ramp up your defenses to keep your users safe. 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00891 · 59.0th percentile
Published
2023-08-28T00:00Z
EPSS history
Timeline
  • 28 AUG 00:00Z
    User enumeration is found in PHPJabbers Event Booking Calendar v4.0
    cvelistv5