CVE-2021-31739

Name: CVE-2021-31739
Creator: NVD / NIST
Published: 2022-11-18T23:15:18.91+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.42%

Last modified Jun 17, 2026

CVE-2021-31739 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. The SEPPmail solution is vulnerable to a Cross-Site Scripting vulnerability (XSS), because user input is not correctly encoded in HTML attributes when returned by the server.SEPPmail 11.1.10 allows XSS via a recipient address.. EPSS estimates a 0.42% chance of exploitation in the next 30 days.

Description

The SEPPmail solution is vulnerable to a Cross-Site Scripting vulnerability (XSS), because user input is not correctly encoded in HTML attributes when returned by the server.SEPPmail 11.1.10 allows XSS via a recipient address.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.42%

33.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Seppmail	Seppmail	11.1.10

References

https://www.pentagrid.ch/en/blog/multiple-vulnerabilities-in-seppmail/Exploit, Third Party Advisory
https://www.pentagrid.ch/en/blog/multiple-vulnerabilities-in-seppmail/Exploit, Third Party Advisory

Timeline

Published: Nov 18, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-31739?

How severe is CVE-2021-31739?

CVE-2021-31739 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.42% probability of exploitation in the next 30 days.

How do I fix CVE-2021-31739?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-31739?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST