CVE-2011-4940

2.6 LOW 3% exploit odds No fix listed

What it is

The list_directory function in Lib/SimpleHTTPServer.py in SimpleHTTPServer in Python before 2.5.6c1, 2.6.x before 2.6.7 rc2, and 2.7.x before 2.7.2 does not place a charset parameter in the Content-Type HTTP header, which makes it easier for remote attackers to conduct cross-site scripting (XSS) attacks against Internet Explorer 7 via UTF-7 encoding.

At a glance

Exploitability: Can be exploited over the network without logging in. Limited direct impact.
Exploit odds: 3.2% chance of exploitation in the next 30 days (EPSS).
Fix: No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

2012-06-27 10:18 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 23:35 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 3.2% in the next 30 days (EPSS).
Severity: 2.6 LOW (CVSS).
Fix: none linked yet, which raises it.

Details

Published: 2012-06-27 10:18 UTC
Last modified: 2026-06-16 23:35 UTC
Exploit probability: 3.2% · EPSS, next 30 days
Weakness: CWE-79 · Cross-site scripting
Record status: Modified

Affected

Python ≤ 2.5.6
Python 0.9.0
Python 0.9.1
Python 1.2
Python 1.3
Python 1.5.2
Python 1.6
Python 1.6.1

Attack profile CVSS 2.0 · 2.6

Attack vector: Network
Complexity: High
Authentication: None
Confidentiality: None
Integrity: Partial
Availability: None

Raw vector

AV:N/AC:H/Au:N/C:N/I:P/A:N

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2011-4940.md and follow it. Check whether this project is affected by CVE-2011-4940. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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References

NVD record · CVE.org record