CVE-2025-43933

fblog through 983bede allows account takeover via the password reset feature because SERVER_NAME is not configured and thus a reset depends on the Host HTTP…

Critical · published July 7, 2025

CVSS v3.1
9.8
EPSS
0%
Percentile
35.3
In the wild
Unconfirmed
What it is

🚨 A missing configuration could hand over the keys to your kingdom! The password reset feature in fblog through 983bede is vulnerable to account takeover because it relies on the Host HTTP header instead of a secure SERVER_NAME. 🔥 Think of it like a hotel without a proper check-in desk. The receptionist will hand out room keys just based on whatever name you say, without verifying it against any official list – a recipe for disaster! With this vulnerability, a clever attacker could easily take control of user accounts, changing passwords, accessing sensitive data, or even impersonating users. This could lead to absolute chaos, affecting both users and the integrity of your system!

Put simply

Think of it like a hotel without a proper check-in desk. The receptionist will hand out room keys just based on whatever name you say, without verifying it against any official list – a recipe for disaster! The flaw occurs because the password reset functionality trusts the Host HTTP header due to an improperly configured SERVER_NAME, making it susceptible to exploitation.

What to do

With this vulnerability, a clever attacker could easily take control of user accounts, changing passwords, accessing sensitive data, or even impersonating users. This could lead to absolute chaos, affecting both users and the integrity of your system! To mitigate this risk, immediately configure your SERVER_NAME properly and implement strict validation of the Host header. Additionally, review your password reset mechanism to ensure it relies on secure identifiers. Keep your software updated to the latest version to avoid vulnerabilities! You've got this! Follow these steps, and you'll have your accounts locked down tighter than a vault! 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00421 · 35.3th percentile
Published
2025-07-07T00:00Z
EPSS history
Timeline
  • 07 JUL 00:00Z
    fblog through 983bede allows account takeover via the password reset feature because SERVER_NAME is not configured and thus a reset depends on the Host HTTP…
    cvelistv5