CVE-2026-33323— Parse Server: Email verification resend page leaks user existence
Quick assessment
Affected
parse-community parse-server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Parse Server是Parse Platform开源的一个开源后端，可以部署到任何可以运行 Node.js 的基础设施。 Parse Server 8.6.51之前版本和9.6.0-alpha.40之前版本存在安全漏洞，该漏洞源于重发邮件验证链接的页面和遗留API路由返回可区分的响应，可能导致未经验证的用户枚举有效用户名。
Possible ATT&CK Techniques 1 AI
T1204.002 · Malicious File
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I. Basic Information for CVE-2026-33323
Vulnerability Information
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Vulnerability Title
Parse Server: Email verification resend page leaks user existence
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
响应差异性信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Parse Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Parse Server是Parse Platform开源的一个开源后端，可以部署到任何可以运行 Node.js 的基础设施。 Parse Server 8.6.51之前版本和9.6.0-alpha.40之前版本存在安全漏洞，该漏洞源于重发邮件验证链接的页面和遗留API路由返回可区分的响应，可能导致未经验证的用户枚举有效用户名。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| parse-community | parse-server | < 8.6.51 | - |
|
II. Public POCs for CVE-2026-33323
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-33323 (4)
Vendor Advisories for CVE-2026-33323 (1)
Same Patch Batch · parse-community · 2026-03-24 · 11 CVEs total
| CVE-2026-33538 | Parse Server: Denial of service via unindexed database query for unconfigured auth provide | |
| CVE-2026-33527 | Parse Server: Session update endpoint allows overwriting server-generated session fields | |
| CVE-2026-33429 | Parse Server: Protected field change detection oracle via LiveQuery watch parameter | |
| CVE-2026-33508 | Parse Server: LiveQuery subscription query depth bypass | |
| CVE-2026-33421 | Parse Server: LiveQuery bypasses CLP pointer permission enforcement | |
| CVE-2026-33498 | Parse Server: Query condition depth bypass via pre-validation transform pipeline | |
| CVE-2026-33409 | Parse Server: Auth provider validation bypass on login via partial authData | |
| CVE-2026-33539 | Parse Server: SQL injection via aggregate and distinct field names in PostgreSQL adapter | |
| CVE-2026-33624 | Parse Server: MFA recovery code single-use bypass via concurrent requests | |
| CVE-2026-33627 | Parse Server: Auth data exposed via /users/me endpoint |
IV. Related Vulnerabilities
Same product: parse-server
-
CVE-2026-66009
Parse Server 9.0.0 Information Disclosure via GraphQL Error -
CVE-2026-66008
Parse Server 9.0.0 Information Disclosure via GraphQL Error -
CVE-2026-64627
Parse Server 9.0.0 Schema Disclosure via GraphQL Variable Co -
CVE-2026-61448
Parse Server 9.0.0 Stored XSS via malformed Content-Type -
CVE-2026-57481
Parse Server: LiveQuery discloses object data to a subscribe
Same vendor: parse-community
-
CVE-2026-66009
Parse Server 9.0.0 Information Disclosure via GraphQL Error -
CVE-2026-66008
Parse Server 9.0.0 Information Disclosure via GraphQL Error -
CVE-2026-64627
Parse Server 9.0.0 Schema Disclosure via GraphQL Variable Co -
CVE-2026-61448
Parse Server 9.0.0 Stored XSS via malformed Content-Type -
CVE-2026-57481
Parse Server: LiveQuery discloses object data to a subscribe
Same weakness: CWE-204
-
CVE-2026-27462
Combodo iTop: User enumeration via password reset -
CVE-2026-69519
Azure Stack HCI Information Disclosure Vulnerability -
CVE-2026-66002
Frappe: User Enumeration via PDDR -
CVE-2026-54739
Lemmy: Login Endpoint User Enumeration via HTTP Response Cod -
CVE-2026-19965
automad Password Reset Endpoint UserController.php requestPa
V. Comments for CVE-2026-33323
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