XML External Entity (XXE) Vulnerability in EasyTax

published 2024-11-29 23 mo ago modified 2026-06-17 4 mo ago also EUVD-2024-50350

cvss: 4.6; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 9%
public exploits: 0; none known

A XML External Entity (XXE) vulnerability has been identified in Easy Tax Client Software 2023 1.2 and earlier across multiple platforms, including Windows, Linux, and macOS.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 23 mo ago (2024-11-29)

Exploit prediction

0.20% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	4.6	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:L/SI:N/SA:L
CNA	4.0	4.6	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:L/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

msg Suisse AG EasyTax

Classification

Weakness

CWE-611 Improper Restriction of XML External Entity Reference
CWE-827 Improper Control of Document Type Definition

References

ag.ch /de/verwaltung/dfr/steuern/natuerliche-personen/steuererklaerung-easytax

Sources

CVE List CVE-2024-9044
NVD CVE-2024-9044

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary