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CVE-2025-63498

MediumPublished

alinto SOGo 5.12.3 is vulnerable to Cross Site Scripting (XSS) via the "userName" parameter.

Published: Nov 24, 2025
Updated: Nov 28, 2025
Assigning CNA: mitre
Evidence observed: Aug 15, 2026

Primary CVSS

6.1/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS probability estimate

0.3%

Low · next 30 days

Percentile: 21.2%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

alinto SOGo 5.12.3 is vulnerable to Cross Site Scripting (XSS) via the "userName" parameter.

Sources

CVE-2025-63498PoC
Stored XSS proof-of-concept for SOGo groupware, exploiting the 'Remember Username' cookie to inject JavaScript payloads via the login endpoint.

Responsible use

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