Medium severity · published May 28, 2025
CVE-2025-5025
libcurl supports *pinning* of the server certificate public key for HTTPS transfers
4.8
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CU
Curl · Haxx
8.5.0 before 8.14.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-5025
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-5025
Vendor Advisory
https://curl.se/docs/CVE-2025-5025.html
Vendor Advisory
https://curl.se/docs/CVE-2025-5025.json
Exploit
https://hackerone.com/reports/3153497
Mailing List
http://www.openwall.com/lists/oss-security/2025/05/28/5
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