CVE-2018-4939KEV · OVERDUE

Adobe ColdFusion Deserialization of Untrusted Data Vulnerability

Critical · published May 19, 2018

Patch now

Confirmed exploited, and the score agrees

CVSS calls it critical at 9.8. It is confirmed in active exploitation. It sits in the 99.2th percentile for exploit probability.

1634
days past CISA
deadline
CVSS v3.1
9.8
EPSS
62%
Percentile
99.2
In the wild
Confirmed
What it is

🚨 We've got a seriously sneaky bug in Adobe ColdFusion that can let an attacker execute arbitrary code with just a crafted payload! 🔥 Think of it like a restaurant chef receiving a recipe that looks perfectly fine but actually tells them to throw in something toxic — it could lead to a disastrous meal! This vulnerability allows malicious data to influence how the system behaves, just like an unvetted recipe can spoil a perfect dish. If exploited, this vulnerability could allow an attacker to take control of the affected system, running any code they wish. This means they could access sensitive information, manipulate data, or completely compromise the server — a potential recipe for chaos!

Put simply

Think of it like a restaurant chef receiving a recipe that looks perfectly fine but actually tells them to throw in something toxic — it could lead to a disastrous meal! This vulnerability allows malicious data to influence how the system behaves, just like an unvetted recipe can spoil a perfect dish. The issue lies in the deserialization of untrusted data in Adobe ColdFusion, which means that an attacker can manipulate serialized objects to execute arbitrary commands on the server.

What to do

If exploited, this vulnerability could allow an attacker to take control of the affected system, running any code they wish. This means they could access sensitive information, manipulate data, or completely compromise the server — a potential recipe for chaos! Update to Adobe ColdFusion 11 Update 14 or later versions immediately to patch this vulnerability. Additionally, ensure that any data being deserialized is from trusted sources only, to mitigate risks. Regularly review your environment for any remnants of earlier versions. You can tackle this! With the right updates and precautions, your system will be secure again in no time. 🛡️

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
0.61987 · 99.2th percentile
Published
2018-05-19T17:00Z
KEV added
2021-11-03 · due 2022-05-03
EPSS history
Timeline
  • 03 NOV 00:00Z
    Added to CISA KEV — remediate by May 3
    kev
  • 19 MAY 17:00Z
    Adobe ColdFusion Update 5 and earlier versions, ColdFusion 11 Update 13 and earlier versions have an exploitable Deserialization of Untrusted Data…
    cvelistv5