Description

Text editor embedded into MegaBIP software does not neutralize user input allowing Stored XSS attacks on other users. In order to use the editor high privileges are required.  
Version 5.20 of MegaBIP fixes this issue.

Classification

CVE ID: CVE-2025-3894

CVSS Base Severity: MEDIUM

CVSS Base Score: 4.8

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Affected Products

Vendor: Jan Syski

Product: MegaBIP

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.05% (probability of being exploited)

EPSS Percentile: 16.87% (scored less or equal to compared to others)

EPSS Date: 2025-06-18 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-3894
https://cert.pl/en/posts/2025/05/CVE-2025-3893
https://megabip.pl/index.php?id=24
145
https://www.gov.pl/web/cyfryzacja/rekomendacja-pelnomocnika-rzadu-ds-cyberbezpieczenstwa-dotyczaca-biuletynow-informacji-publicznej

Timeline