Home/CVE/libcurl supports *pinning* of the server certificate public key for HTTPS transfers. Due to an omission, this check is n
CVE

CVE-2025-5025

libcurl supports *pinning* of the server certificate public key for HTTPS transfers. Due to an omission, this check is n

libcurl supports pinning of the server certificate public key for HTTPS transfers. Due to an omission, this check is not performed when connecting with QUIC for HTTP/3, when the TLS backend is wolfSSL. Documentation says the option works with wolfSSL, failing to specify that it does not for QUIC and HTTP/3.

Since pinning makes the transfer succeed if the pin is fine, users could unwittingly connect to an impostor server without noticing.

MEDIUM · CVSS 4.8 EPSS 0.0006
Schedule remediation
  • Public exploit or PoC is available
Sigma rules7 YARA rules0
⬡

Weakness Classification

CWE-295Improper Certificate Validation
▤

Affected Products & Versions

1
haxx curl>= 8.5.0 and < 8.14.0
⚠

Public Exploits & PoCs

1
pochackerone.com · 3153497hackerone.com
◈

Sigma Hunt Rules

7
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSuspicious Download and Execute Pattern via Curl/Wget
producthighSuspicious File Download From File Sharing Domain Via Curl.EXE
producthighSuspicious File Download From IP Via Curl.EXE
producthighCurl Download And Execute Combination
producthighSuspicious Curl.EXE Download
productmediumSuspicious Curl File Upload - Linux
▣

Scoring & Timeline

4.8
MEDIUM · CVSS v3.1 · 2499f714-1537-4658-8207-48ae4bb9eae9
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD28 May 2025 · 07:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

4
suse-csafSUSE-SU-2025:03198-1
suse-csafSUSE-SU-2025:20675-1
msrcCVE-2025-5025
suse-csafopenSUSE-SU-2025:15176-1
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://curl.se/docs/CVE-2025-5025.htmlVendor Advisory
https://curl.se/docs/CVE-2025-5025.jsonVendor Advisory
http://www.openwall.com/lists/oss-security/2025/05/28/5Mailing ListThird Party Advisory
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