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CVE-2026-35608: QuickDrop has stored XSS in SVG file preview endpoint allowing JavaScript execution

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-07 · updated 2026-10-26
• Weakness: CWE-79

Description

QuickDrop is an easy-to-use file sharing application. Prior to 1.5.3, a stored XSS vulnerability exists in the file preview endpoint. The application allows SVG files to be uploaded via the /api/file/upload-chunk endpoint. An attacker can upload a specially crafted SVG file containing a JavaScript payload. When any user views the file preview, the script executes in the context of the application's domain. This vulnerability is fixed in 1.5.3.

Affected products

• RoastSlav quickdrop: before 1.5.3 — fixed in 1.5.3

How to fix

Upgrade to a fixed version: RoastSlav quickdrop 1.5.3. Check the vendor advisory for mitigations.

References

• https://github.com/RoastSlav/quickdrop/releases/tag/v1.5.3
• https://github.com/RoastSlav/quickdrop/security/advisories/GHSA-f577-ffvv-w6rr

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