CVE-2025-62459CWE-79cross-site-scripting

CVE-2025-62459

High · published November 21, 2025

CVSS v3.1
8.3
EPSS
0%
Percentile
25.2
In the wild
Unconfirmed
What it is

⚡ A crafty spoofing vulnerability in the Microsoft Defender Portal could let attackers impersonate official notifications, like a fake delivery driver convincing you to hand over your package! 📦 Think of it like a con artist showing up at your door with a convincing uniform, claiming to be from the delivery service while actually intending to steal your packages. If users are fooled, they might unwittingly provide sensitive information or access to their systems. If exploited, an attacker could send misleading alerts that look genuine, creating absolute chaos in your security protocols. Imagine falling for a phishing scheme that leads to unauthorized access — it could be devastating for your organization!

Put simply

Think of it like a con artist showing up at your door with a convincing uniform, claiming to be from the delivery service while actually intending to steal your packages. If users are fooled, they might unwittingly provide sensitive information or access to their systems. This spoofing vulnerability allows someone to deceive users by mimicking trusted communications from the Microsoft Defender Portal, making it easier to extract sensitive information or gain unauthorized access to systems.

What to do

If exploited, an attacker could send misleading alerts that look genuine, creating absolute chaos in your security protocols. Imagine falling for a phishing scheme that leads to unauthorized access — it could be devastating for your organization! To safeguard yourself, ensure that you apply the latest updates from Microsoft, review your security settings, and educate your team about recognizing suspicious activity. User awareness is key in avoiding these sneaky traps! You've got this! Stay vigilant and proactive, and you'll keep your systems safe and sound! 🛡️

The record
Technical detail
CVSS v3.1
8.3 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
CVSS v4.0
Not supplied
EPSS
0.00331 · 25.2th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2025-11-21T04:15Z
Affected products (1)
ProductVersionsFixed in
microsoft/365_defender_portalall versions—
References (1)
EPSS history
Timeline
  • 20 NOV 22:18Z
    Microsoft Defender Portal Spoofing Vulnerability
    cvelistv5