CVE-2023-41763KEV · OVERDUECWE-918

Skype for Business Elevation of Privilege Vulnerability

Medium · published October 10, 2023

Patch now

The score understates this — it's already being exploited

CVSS calls it medium at 5.3. It is confirmed in active exploitation. It sits in the 99.8th percentile for exploit probability.

1088
days past CISA
deadline
CVSS v3.1
5.3
EPSS
91%
Percentile
99.8
In the wild
Confirmed
What it is

⚠️ A sneaky privilege escalation in Skype for Business could let attackers gain elevated access—imagine if a guest at a party suddenly got the keys to the VIP lounge! This flaw is like an unexpected party crasher who charms their way past the bouncer. Once in, they could gain access to sensitive conversations and confidential data, much like a guest suddenly invited to the secret meeting. 🎉 With this vulnerability, an attacker could escalate their privileges, potentially accessing features and data that should remain off-limits. This could lead to unauthorized actions or information leaks, putting sensitive communications at risk. Yikes! 😱

Put simply

This flaw is like an unexpected party crasher who charms their way past the bouncer. Once in, they could gain access to sensitive conversations and confidential data, much like a guest suddenly invited to the secret meeting. 🎉 CVE-2023-41763 allows an attacker to elevate privileges through a series of manipulated requests, exploiting the way permissions are handled within Skype for Business. This means a user with standard access could gain far more control than intended.

What to do

With this vulnerability, an attacker could escalate their privileges, potentially accessing features and data that should remain off-limits. This could lead to unauthorized actions or information leaks, putting sensitive communications at risk. Yikes! 😱 To protect your environment, update Skype for Business to the latest version as soon as possible. Additionally, conduct an audit of user permissions to ensure that no one has more access than they should. Vigilance is key! 🛡️ You've got this! Stay proactive, patch up, and keep your communications secure! 🚀

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.90547 · 99.8th percentile
Weakness
CWE-918 · Server-Side Request Forgery (SSRF)
Published
2023-10-10T17:07Z
KEV added
2023-10-10 · due 2023-10-31
EPSS history
Timeline
  • 10 OCT 17:07Z
    Skype for Business Elevation of Privilege Vulnerability
    cvelistv5
  • 10 OCT 00:00Z
    Added to CISA KEV — remediate by Oct 31
    kev