CVE-2017-12611

In Apache Struts 2.0.0 through 2.3.33 and 2.5 through 2.5.10.1, using an unintentional expression in a Freemarker tag instead of string literals can lead to a…

published September 20, 2017

Patch now

High probability of exploitation

NVD has not assigned a CVSS score to this record. It sits in the 99.8th percentile for exploit probability.

CVSS
—
EPSS
87%
Percentile
99.8
In the wild
Unconfirmed
What it is

⚠️ A tiny oversight in Apache Struts can open the door to a remote code execution disaster! One little expression in a Freemarker tag instead of a string literal makes this vulnerability surprisingly sneaky. 🔥 Think of it as a restaurant where a waiter mistakenly serves a secret recipe instead of just a plain dish. If the kitchen trusts this mix-up, they might end up cooking up something dangerous without checking the ingredients! An attacker could exploit this vulnerability to run arbitrary code on the server, potentially taking full control. This could lead to data theft, service disruption, or even complete system compromise — absolutely devastating for any organization relying on the affected systems!

Put simply

Think of it as a restaurant where a waiter mistakenly serves a secret recipe instead of just a plain dish. If the kitchen trusts this mix-up, they might end up cooking up something dangerous without checking the ingredients! In Apache Struts versions 2.0.0 through 2.3.33 and 2.5 through 2.5.10.1, a misconfigured Freemarker tag allows attackers to inject expressions instead of string literals, enabling remote code execution. Essentially, it provides an avenue for executing unauthorized commands on the server.

What to do

An attacker could exploit this vulnerability to run arbitrary code on the server, potentially taking full control. This could lead to data theft, service disruption, or even complete system compromise — absolutely devastating for any organization relying on the affected systems! To mitigate this vulnerability, upgrade Apache Struts to versions beyond 2.3.33 or 2.5.10.1 immediately. Review all usage of Freemarker tags to ensure only string literals are used, and implement strict input validation to prevent similar issues in the future. You've got this! With these steps, you'll be on your way to securing your systems in no time! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.87123 · 99.8th percentile
Published
2017-09-20T17:00Z
EPSS history
Timeline
  • 20 SEP 17:00Z
    In Apache Struts 2.0.0 through 2.3.33 and 2.5 through 2.5.10.1, using an unintentional expression in a Freemarker tag instead of string literals can lead to a…
    cvelistv5