CVE-2025-11563: wcurl path traversal with percent-encoded slashes
Vulnerability summary
CVE-2025-11563 is a medium (CVSS 4.6) vulnerability in curl. EPSS estimates a 0.42% chance of exploitation in the next 30 days, higher than 35.9% of scored vulnerabilities.
Not severe (CVSS 4.6, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 5 · Related 5Timeline
- 25-02-2026PublishedVulnerability first disclosed.
- 25-02-2026Last modifiedVulnerability information updated.
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 metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated4.6MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
- OSV · DebianEcosystem advisory · calculated4.6MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
- NVDNIST4.6MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
EPSS trend
Probability
0.42%
Chance of exploitation in the next 30 days
Percentile
36%
Versus all other CVEs
30-day change
Increase +0.04 pp
From 0.37% on 04-10-2026
Known exploited
Compare KEV catalogsNot in the CISA KEV catalog.
Not in the ENISA CNW catalog.
Not in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, low-privilege account, user interaction (CVSS vector). Other conditions: not stated in public data.
Suse8 products
- curl&distro=SUSE Linux Enterprise Micro 5.2< 8.14.1-150200.4.94.1
- curl&distro=SUSE Linux Enterprise Micro 5.3< 8.14.1-150400.5.72.1
- curl&distro=SUSE Linux Enterprise Micro 5.4< 8.14.1-150400.5.72.1
- curl&distro=SUSE Linux Enterprise Micro 5.5< 8.14.1-150400.5.72.1
- curl&distro=SUSE Linux Enterprise Module for Basesystem 15 SP6< 8.14.1-150600.4.31.1
Debian1 product
- curl< 8.14.1-2+deb13u2 | < 8.17.0-2
Opensuse1 product
- curl&distro=openSUSE Leap 15.6< 8.14.1-150600.4.31.1
Ubuntu1 product
- curl< 8.14.1-2ubuntu1.1
5 vendors · 13 products
References
16 links- curl.se/docs/CVE-2025-11563.jsonVendor Advisory
- lists.debian.org/debian-release/2025/11/msg00504.htmlRelease NotesMailing ListPatchThird Party Advisory