CVE-2026-33323
MEDIUMParse Server: Email verification resend page leaks user existence
Title source: cnaDescription
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.51 and 9.6.0-alpha.40, the Pages route and legacy PublicAPI route for resending email verification links return distinguishable responses depending on whether the provided username exists and has an unverified email. This allows an unauthenticated attacker to enumerate valid usernames by observing different redirect targets. The existing emailVerifySuccessOnInvalidEmail configuration option, which is enabled by default and protects the API route against this, did not apply to these routes. This issue has been patched in versions 8.6.51 and 9.6.0-alpha.40.
References (5)
Core 5
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/parse-community/parse-server/security/advisories/GHSA-h29g-q5c2-9h4f
X_Refsource_Misc x_refsource_misc
https://github.com/parse-community/parse-server/pull/10238
X_Refsource_Misc x_refsource_misc
https://github.com/parse-community/parse-server/pull/10243
X_Refsource_Misc x_refsource_misc
https://github.com/parse-community/parse-server/commit/967aa57732202009b2389ce9ecb3130d53d657e5
X_Refsource_Misc x_refsource_misc
https://github.com/parse-community/parse-server/commit/fbda4cb0c5cbc8fad08a216823b6b64d4ae289c3
Scores
CVSS v3
5.3
EPSS
0.0032
EPSS Percentile
23.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-204
Status
published
Products (5)
npm/parse-server
9.0.0 - 9.6.0-alpha.40npm
parse-community/parse-server
< 8.6.51
parse-community/parse-server
>= 9.0.0, < 9.6.0-alpha.40
parseplatform/parse-server
9.6.0 alpha1 (39 CPE variants)
parseplatform/parse-server
< 8.6.51
Published
Mar 24, 2026
Tracked Since
Mar 25, 2026