CVE-2026-33323
published 2026-03-24CVE-2026-33323: 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…
PriorityP433medium5.3CVSS 3.1
AVNACLPRNUINSUCLINAN
EPSS
0.32%
24.0th percentile
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.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| parse-community | parse-server | < 8.6.51 | 8.6.51 |
| parse-community | parse-server | — | — |
| parse-community | parse-server | >= 0 < 8.6.51 | 8.6.51 |
| parse-community | parse-server | >= 9.0.0 < 9.6.0-alpha.40 | 9.6.0-alpha.40 |
| parseplatform | parse-server | < 8.6.51 | 8.6.51 |
| parseplatform | parse-server | — | — |
| parseplatform | parse-server | >= 9.0.0 < 9.6.0 | 9.6.0 |
CVSS provenance
nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
nvdv4.06.3MEDIUMCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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GHSA
Parse Server email verification resend page leaks user existence
ghsa·2026-03-19
CVE-2026-33323 [MEDIUM] CWE-204 Parse Server email verification resend page leaks user existence
Parse Server email verification resend page leaks user existence
### Impact
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.
### Patches
The email verification resend routes now respect the `emailVerifySuccessOnInvalidEmail` option. When set to `true` (the default), both routes redirect to the success page regardless of the outcome, preventing user enumeration.
### Wo
OSV
Parse Server email verification resend page leaks user existence
osv·2026-03-19
CVE-2026-33323 [MEDIUM] Parse Server email verification resend page leaks user existence
Parse Server email verification resend page leaks user existence
### Impact
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.
### Patches
The email verification resend routes now respect the `emailVerifySuccessOnInvalidEmail` option. When set to `true` (the default), both routes redirect to the success page regardless of the outcome, preventing user enumeration.
### Wo
No detection rules found.
No public exploits indexed.
https://github.com/parse-community/parse-server/commit/967aa57732202009b2389ce9ecb3130d53d657e5https://github.com/parse-community/parse-server/commit/fbda4cb0c5cbc8fad08a216823b6b64d4ae289c3https://github.com/parse-community/parse-server/pull/10238https://github.com/parse-community/parse-server/pull/10243https://github.com/parse-community/parse-server/security/advisories/GHSA-h29g-q5c2-9h4f
2026-03-24
Published