What is CVE-2019-3958?

CVE-2019-3958 is a medium-severity vulnerability in Wallaceit Wallacepos, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2019-07-31.

How severe is CVE-2019-3958?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Wallaceit Wallacepos

CVE-2019-3958

Insufficient output sanitization in WallacePOS 1.4.3 allows a remote, authenticated attacker to conduct persistent cross-site scripting (XSS) attacks via a crafted sales transaction.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-07-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.009 (57.0th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Wallaceit Wallacepos — versions 1.4.3
Wallacepos — versions 1.4.3

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.tenable.com/security/research/tra-2019-37 (Exploit, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2019-3958?: CVE-2019-3958 is a medium-severity vulnerability in Wallaceit Wallacepos, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2019-07-31.
How severe is CVE-2019-3958?: Medium severity. CVSS v3 base score is 5.4 out of 10.