Medium severity · published Feb 25, 2026
CVE-2025-11563
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
4.6
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WC
Wcurl · Curl
2024-12-08 before 2025-11-09 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-11563
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-11563
Patch
https://curl.se/docs/CVE-2025-11563.html
Vendor Advisory
https://curl.se/docs/CVE-2025-11563.json
Mailing List
http://www.openwall.com/lists/oss-security/2025/11/04/1
Mailing List
https://lists.debian.org/debian-release/2025/11/msg00504.html