GHSA-p6c5-mjgj-m4rm

Source

https://github.com/advisories/GHSA-p6c5-mjgj-m4rm

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-p6c5-mjgj-m4rm/GHSA-p6c5-mjgj-m4rm.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-p6c5-mjgj-m4rm

Withdrawn

2026-10-29T16:33:41Z

Published

2026-07-11T15:30:23Z

Modified

2026-10-29T16:45:04Z

Severity

2.1 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/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 CVSS Calculator

Summary

Duplicate Advisory: Parse Server vulnerable to stored XSS via malformed Content-Type bypassing file upload extension blocklist

Details

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-r899-h629-j84r. This link is maintained to preserve external references.

Original Description

Parse Server is affected by a stored cross-site scripting (XSS) vulnerability in versions >= 9.0.0, < 9.10.0-alpha.2 and <= 8.6.83. When an uploaded file's extension is not recognized by the mime package, Parse Server preserves the client-supplied Content-Type. A malformed Content-Type that is not a valid type/subtype media type (e.g., 'image', 'image/', or 'image//svg+xml') bypasses the fileUpload.fileExtensions blocklist and is stored unchanged. On storage adapters that persist and serve the uploaded Content-Type (such as Amazon S3, Google Cloud Storage, or Azure Blob Storage), a browser cannot parse the malformed value and falls back to MIME-sniffing; a file whose body begins with HTML is rendered as HTML, executing embedded script in the application's origin against other users who open the file URL. The default GridFS storage adapter is not affected. Fixed in 9.10.0-alpha.2 and 8.6.84.

Database specific

{
    "cwe_ids":  [
        "CWE-434"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-10-29T16:33:41Z",
    "nvd_published_at":  "2026-07-11T14:16:23Z",
    "severity":  "LOW"
}

References

Affected packages

npm / parse-server

Package

Name: parse-server; View open source insights on deps.dev
Purl: pkg:npm/parse-server

Affected ranges

Type: SEMVER
Events: Introduced

9.0.0

Database specific

last_known_affected_version_range

"< 9.10.0-alpha.2"

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-p6c5-mjgj-m4rm/GHSA-p6c5-mjgj-m4rm.json"

npm / parse-server

Package

Name: parse-server; View open source insights on deps.dev
Purl: pkg:npm/parse-server

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Last Affected

8.6.83

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-p6c5-mjgj-m4rm/GHSA-p6c5-mjgj-m4rm.json"