JLSEC-2025-31

    Dashboard / Vulnerabilities / JLSEC-2025-31

    JLSEC-2025-31

    Published: 10 Oct 2025Last Modified: 25 Jul 2026
    Upstream:
    CVE-2023-27535

    Summary: An authentication bypass vulnerability exists in libcurl <8.0.0 in the FTP connection reuse feature...

    Details: An authentication bypass vulnerability exists in libcurl <8.0.0 in the FTP connection reuse feature that can result in wrong credentials being used during subsequent transfers. Previously created connections are kept in a connection pool for reuse if they match the current setup. However, certain FTP settings such as `CURLOPT_FTP_ACCOUNT`, `CURLOPT_FTP_ALTERNATIVE_TO_USER`, `CURLOPT_FTP_SSL_CCC`, and `CURLOPT_USE_SSL` were not included in the configuration match checks, causing them to match too easily. This could lead to libcurl using the wrong credentials when performing a transfer, potentially allowing unauthorized access to sensitive information.

    References: https://hackerone.com/reports/1892780, https://lists.debian.org/debian-lts-announce/2023/04/msg00025.html, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/, https://security.gentoo.org/glsa/202310-12, https://security.netapp.com/advisory/ntap-20230420-0010/

    Affected packages

    Package

    Name: CURL_jll

    Purl: pkg:julia/CURL_jll?uuid=b21e61f3-bafc-59ac-ab14-4c5c62d6588d

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -8.5.0+0

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    JLSEC-2025-31 | CVE-DB