Failure to Sanitize Special Elements into a Different Plane (Special Element Injection) Affecting libcurl package, versions [7.76.0,8.0.0)


Severity

Recommended
0.0
medium
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.1% (29th percentile)

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  • Snyk IDSNYK-CONAN-LIBCURL-10076458
  • published8 May 2025
  • disclosed20 Mar 2023
  • creditUnknown

Introduced: 20 Mar 2023

CVE-2023-27533  (opens in a new tab)
CWE-75  (opens in a new tab)

How to fix?

Upgrade libcurl to version 8.0.0 or higher.

Overview

Affected versions of this package are vulnerable to Failure to Sanitize Special Elements into a Different Plane (Special Element Injection) due to lack of proper input scrubbing and without it being the documented functionality, curl would pass on user name and telnet options to the server as provided. This could allow users to pass in carefully crafted content that pass on content or do option negotiation without the application intending to do so. In particular if an application for example allows users to provide the data or parts of the data.

CVSS Base Scores

version 3.1