CVE-2023-24955KEV · OVERDUECWE-94

Microsoft SharePoint Server Remote Code Execution Vulnerability

High · published May 9, 2023

Patch now

Confirmed exploited, and the score agrees

CVSS calls it high at 7.2. It is confirmed in active exploitation. It sits in the 99.7th percentile for exploit probability.

921
days past CISA
deadline
CVSS v3.1
7.2
EPSS
85%
Percentile
99.7
In the wild
Confirmed
What it is

🚨 A crafty little flaw in Microsoft SharePoint lets attackers execute remote code like they’re flipping a switch! ⚡ Think of this vulnerability as a digital locksmith with a master key that opens every door in a building. If they gain access, they can reprogram security systems and wreak havoc without a trace! An attacker exploiting this vulnerability could take complete control of the SharePoint server, allowing them to steal sensitive data, install malicious software, or alter critical information. The consequences could be absolutely devastating for organizations relying on SharePoint for collaboration and document management!

Put simply

Think of this vulnerability as a digital locksmith with a master key that opens every door in a building. If they gain access, they can reprogram security systems and wreak havoc without a trace! This remote code execution vulnerability occurs due to improper handling of requests in Microsoft SharePoint Server, allowing an unauthorized user to run arbitrary code remotely.

What to do

An attacker exploiting this vulnerability could take complete control of the SharePoint server, allowing them to steal sensitive data, install malicious software, or alter critical information. The consequences could be absolutely devastating for organizations relying on SharePoint for collaboration and document management! To protect yourself, update SharePoint Server to the latest patched version immediately. Review your security policies and ensure that only authenticated users have access to critical functionalities. It's also wise to conduct a thorough audit of your system for any signs of exploitation. You've got this! Follow these steps, and you'll lock down your SharePoint environment in no time. 🛡️

The record
Technical detail
CVSS v3.1
7.2 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.84974 · 99.7th percentile
Weakness
CWE-94 · Improper Control of Generation of Code ('Code Injection')
Published
2023-05-09T17:03Z
KEV added
2024-03-26 · due 2024-04-16
EPSS history
Timeline
  • 26 MAR 00:00Z
    Added to CISA KEV — remediate by Apr 16
    kev
  • 09 MAY 17:03Z
    Microsoft SharePoint Server Remote Code Execution Vulnerability
    cvelistv5