When curl is instructed to get content using the metalink feature, and a user name and password are used to download the metalink XML file, those same credentials are then subsequently passed on to each of the servers from which curl will download or try to download the contents from. Often contrary to the user's expectations and intentions and without telling the user it happened.
https://hackerone.com/reports/1213181
https://security.netapp.com/advisory/ntap-20210902-0003/
https://www.oracle.com/security-alerts/cpuoct2021.html
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
Source: MITRE
Published: 2021-08-05
Updated: 2022-04-06
Type: CWE-522
Base Score: 2.6
Vector: AV:N/AC:H/Au:N/C:P/I:N/A:N
Impact Score: 2.9
Exploitability Score: 4.9
Severity: LOW
Base Score: 5.3
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Impact Score: 3.6
Exploitability Score: 1.6
Severity: MEDIUM