CVE-2025-11563

Publication date 25 February 2026

Last updated 27 February 2026

Ubuntu priority

Cvss 3 Severity Score

Description

URLs containing percent-encoded slashes (`/` or `\`) can trick wcurl into saving the output file outside of the current directory without the user explicitly asking for it. This flaw only affects the wcurl command line tool.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
curl	25.10 questing	Fixed 8.14.1-2ubuntu1.1
	25.04 plucky	Ignored end of life, was needed
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected

Notes

mdeslaur

in plucky, located in debian/wcurl directory

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
curl	Upstream: 524f7e7 Upstream: fb0c014

Severity score breakdown

Parameter	Value
Base score	4.6 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	Low
User interaction	Required
Scope	Unchanged
Confidentiality	Low
Integrity impact	Low
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

References

Related Ubuntu Security Notices (USN)

USN-8062-1
curl vulnerabilities
25 February 2026