Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.64 and 9.7.0-alpha.8, an attacker who possesses a valid authentication provider token and a single MFA recovery code or SMS one-time password can create multiple authenticated sessions by sending concurrent login requests via the authData login endpoint. This defeats the single-use guarantee of MFA recovery codes and SMS one-time passwords, allowing session persistence even after the legitimate user revokes detected sessions. This issue has been patched in versions 8.6.64 and 9.7.0-alpha.8.
https://github.com/parse-community/parse-server/security/advisories/GHSA-w73w-g5xw-rwhf
https://github.com/parse-community/parse-server/pull/10327
https://github.com/parse-community/parse-server/pull/10326
https://github.com/parse-community/parse-server/commit/e7efbebba398ce6abe5b6b6fb9829c6ebe310fbf
https://github.com/parse-community/parse-server/commit/661f160edac8daac0486bc94413cf9652876ab92
Published: 2026-03-31
Updated: 2026-07-24
Base Score: 4.6
Vector: CVSS2#AV:N/AC:H/Au:M/C:N/I:C/A:N
Severity: Medium
Base Score: 4.4
Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N
Severity: Medium
Base Score: 2.1
Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Severity: Low
EPSS: 0.00062