CVE-2014-4650

CRITICAL

9.8

CVSS Score

Published: February 20, 2020 at 04:01 PM UTC

Updated: June 17, 2026 at 12:10 AM UTC

3 products affected across 2 vendorsEnterprise LinuxPythonSoftware Collections

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Severity

CRITICAL9.8

Exploit prediction

EPSS 24%

Description

The CGIHTTPServer module in Python 2.7.5 and 3.3.4 does not properly handle URLs in which URL encoding is used for path separators, which allows remote attackers to read script source code or conduct directory traversal attacks and execute unintended code via a crafted character sequence, as demonstrated by a %2f separator.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Python · Python

95%

2.7.0 ≤ v < 2.7.83.2.0 ≤ v < 3.2.63.3.0 ≤ v < 3.3.63.4.0 ≤ v < 3.4.2

Affected range stops below 2.7.8, so it looks safe — our inference, not a vendor statement

Affected range stops below 3.2.6, so it looks safe — our inference, not a vendor statement

Affected range stops below 3.3.6, so it looks safe — our inference, not a vendor statement

Affected range stops below 3.4.2, so it looks safe — our inference, not a vendor statement

Enterprise Linux · Red Hatrpm

95%

5.0 6.0 7.0

Software Collections · Red Hatrpm

95%

All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

x_refsource_MISCExploitPatchVendor Advisory

Source: [email protected]

http://bugs.python.org/issue21766

x_refsource_MISCMailing ListThird Party Advisory

Source: [email protected]

http://openwall.com/lists/oss-security/2014/06/26/3

Vendor Advisoryx_refsource_REDHATThird Party Advisory

Source: [email protected]

https://access.redhat.com/security/cve/cve-2014-4650

CVSS

9.8CRITICAL[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-22

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