Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.4 and 8.6.30, an attacker can upload a file with a file extension or content type that is not blocked by the default configuration of the Parse Server fileUpload.fileExtensions option. The file can contain malicious code, for example JavaScript in an SVG or XHTML file. When the file is accessed via its URL, the browser renders the file and executes the malicious code in the context of the Parse Server domain. This is a stored Cross-Site Scripting (XSS) vulnerability that can be exploited to steal session tokens, redirect users, or perform actions on behalf of other users. Affected file extensions and content types include .svgz, .xht, .xml, .xsl, .xslt, and content types application/xhtml+xml and application/xslt+xml for extensionless uploads. Uploading of .html, .htm, .shtml, .xhtml, and .svg files was already blocked. This vulnerability is fixed in 9.6.0-alpha.4 and 8.6.30.
Metrics
Affected Vendors & Products
References
History
Fri, 13 Mar 2026 18:30:00 +0000
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Parseplatform
Parseplatform parse-server |
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| CPEs | cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:* cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha1:*:*:*:node.js:*:* cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha2:*:*:*:node.js:*:* cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha3:*:*:*:node.js:*:* |
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| Vendors & Products |
Parseplatform
Parseplatform parse-server |
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| Metrics |
cvssV3_1
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Thu, 12 Mar 2026 20:15:00 +0000
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ssvc
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Thu, 12 Mar 2026 10:15:00 +0000
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Parse Community
Parse Community parse Server |
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| Vendors & Products |
Parse Community
Parse Community parse Server |
Wed, 11 Mar 2026 18:15:00 +0000
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| Description | Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.4 and 8.6.30, an attacker can upload a file with a file extension or content type that is not blocked by the default configuration of the Parse Server fileUpload.fileExtensions option. The file can contain malicious code, for example JavaScript in an SVG or XHTML file. When the file is accessed via its URL, the browser renders the file and executes the malicious code in the context of the Parse Server domain. This is a stored Cross-Site Scripting (XSS) vulnerability that can be exploited to steal session tokens, redirect users, or perform actions on behalf of other users. Affected file extensions and content types include .svgz, .xht, .xml, .xsl, .xslt, and content types application/xhtml+xml and application/xslt+xml for extensionless uploads. Uploading of .html, .htm, .shtml, .xhtml, and .svg files was already blocked. This vulnerability is fixed in 9.6.0-alpha.4 and 8.6.30. | |
| Title | Parse Server has Stored XSS via file upload of HTML-renderable file types | |
| Weaknesses | CWE-79 | |
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cvssV4_0
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-03-11T17:54:33.704Z
Updated: 2026-03-12T20:10:51.157Z
Reserved: 2026-03-09T19:02:25.013Z
Link: CVE-2026-31868
Updated: 2026-03-12T20:10:48.867Z
Status : Analyzed
Published: 2026-03-11T18:16:25.850
Modified: 2026-03-13T18:25:43.163
Link: CVE-2026-31868
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