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CVE-2026-30948— Parse Server has stored cross-site scripting (XSS) via SVG file upload

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 9.5.2-alpha.4之前版本和8.6.17之前版本存在跨站脚本漏洞，该漏洞源于上传SVG文件时清理和转义不足，可能导致存储型跨站脚本攻击。

AI Predicted 7.5 Difficulty: Easy EPSS 0.31% · P21
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I. Basic Information for CVE-2026-30948

Vulnerability Information
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Vulnerability Title
Parse Server has stored cross-site scripting (XSS) via SVG file upload
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 9.5.2-alpha.4 and 8.6.17, a stored cross-site scripting (XSS) vulnerability allows any authenticated user to upload an SVG file containing JavaScript. The file is served inline with Content-Type: image/svg+xml and without protective headers, causing the browser to execute embedded scripts in the Parse Server origin. This can be exploited to steal session tokens from localStorage and achieve account takeover. The default fileExtensions option blocks HTML file extensions but does not block SVG, which is a well-known XSS vector. All Parse Server deployments where file upload is enabled for authenticated users (the default) are affected. This vulnerability is fixed in 9.5.2-alpha.4 and 8.6.17.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:H/SI:H/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Parse Server 跨站脚本漏洞
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 9.5.2-alpha.4之前版本和8.6.17之前版本存在跨站脚本漏洞，该漏洞源于上传SVG文件时清理和转义不足，可能导致存储型跨站脚本攻击。
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 >= 9.0.0 < 9.5.2-alpha.4 -

II. Public POCs for CVE-2026-30948

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III. Intelligence Information for CVE-2026-30948

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Vendor Advisories for CVE-2026-30948 (1)

Vendor Pages for CVE-2026-30948 (2)

Same Patch Batch · parse-community · 2026-03-10 · 14 CVEs total

CVE-2026-30966 10.0 CRITICAL Parse Server role escalation and CLP bypass via direct `_Join` table write
CVE-2026-30939 Parse Server has Denial of Service (DoS) and Cloud Function Dispatch Bypass via Prototype
CVE-2026-30941 Parse Server has a NoSQL injection via token type in password reset and email verification
CVE-2026-30938 Parse Server has denylist `requestKeywordDenylist` keyword scan bypass through nested obje
CVE-2026-30949 Parse Server is missing audience validation in Keycloak authentication adapter
CVE-2026-30946 Parse Server affected by denial-of-service via unbounded query complexity in REST and Grap
CVE-2026-30947 Parse Server ha a bypass of class-level permissions in LiveQuery
CVE-2026-31800 Parse Server: Classes `_GraphQLConfig` and `_Audience` master key bypass via generic class
CVE-2026-30972 Parse Server has a rate limit bypass via batch request endpoint
CVE-2026-30962 Parse Server has a protected fields bypass via logical query operators
CVE-2026-30967 Parse Server OAuth2 authentication adapter account takeover via identity spoofing
CVE-2026-30965 Parse Server session token exfiltration via `redirectClassNameForKey` query parameter
CVE-2026-31828 Parse Server has an LDAP injection via unsanitized user input in DN and group filter const

IV. Related Vulnerabilities

Same product: parse-server
Same vendor: parse-community
Same weakness: CWE-79

V. Comments for CVE-2026-30948

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