CVE-2026-41877: Stored XSS in R-SOFT DMS

Severity: medium (CVSS 5.1 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-10 · updated 2026-10-25
Weakness: CWE-79

Description

R-SOFT DMS is vulnerable to Stored XSS in file upload functionality. Authenticated attacker can inject arbitrary HTML and JS into the name of the file being uploaded, which will be executed when visiting file list or upload status by other users. This issue was fixed in version v3.19-2832 and v3.17-2580.

Affected products

R-SOFT SERWIS DMS: before v3.19-2832; before v3.17-2580 — fixed in v3.17-2580, v3.19-2832

How to fix

Upgrade to a fixed version: R-SOFT SERWIS DMS v3.17-2580, v3.19-2832. Check the vendor advisory for mitigations.

References

https://cert.pl/posts/2026/07/CVE-2026-41876

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