Stored XSS via unsanitized public custom JavaScript
Published Dec 17, 2025 · Updated Dec 17, 2025
Stored cross-site scripting in ProjectSend r1605 allows remote authenticated administrators to execute JavaScript in other users' browsers. The custom-assets-add.php endpoint stores the submitted content field as a public head asset, and public pages emit that saved JavaScript without neutralization. Exploitation requires an administrator session and a subsequent page visit; the persistent script can read or alter data available in the visitor's browser context.
Summary
What happened
Stored cross-site scripting in ProjectSend r1605 allows remote authenticated administrators to execute JavaScript in other users' browsers. The custom-assets-add.php endpoint stores the submitted content field as a public head asset, and public pages emit that saved JavaScript without neutralization. Exploitation requires an administrator session and a subsequent page visit; the persistent script can read or alter data available in the visitor's browser context.
The record
- CVE
- CVE-2023-53906
- Published
- Dec 17, 2025
- Updated
- Dec 17, 2025
- Vendor
- ProjectSend
- Product
- ProjectSend
- Classifications
- CWE-79, T1059.007
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Dec 17, 2025CVE publishedPublication date reported by the CVE source.
- Dec 17, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=r1605
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- ProjectSend r1605 Stored XSS Proof of Conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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