CVE-2025-53839
Published: 15 July 2025
Summary
CVE-2025-53839 is a medium-severity Cross-site Scripting (CWE-79) vulnerability. Its CVSS base score is 4.0 (Medium).
Operationally, ranked at the 35.8th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-21397
Vulnerability details
DRACOON is a file sharing service, and the DRACOON Branding Service allows customers to customize their DRACOON interface with their brand. Versions of the DRACOON Branding Service prior to 2.10.0 are vulnerable to cross-site scripting. Improper neutralization of input from…
more
administrative users could inject HTML code into the workflow for newly onboarded users. A fix was made available in version 2.10.0 and rolled out to the DRACOON service. DRACOON customers do not need to take action.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.
Validates web inputs to reject script-related content that could produce XSS.
Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.