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Fencer Vulns
high 7.5

CVE-2020-14940 json

An issue was discovered in io/gpx/GPXDocumentReader.java in TuxGuitar 1.5.4.

published 2020-06-23 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-7076

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.7%
EPSS 3.7% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

An issue was discovered in io/gpx/GPXDocumentReader.java in TuxGuitar 1.5.4. It uses misconfigured XML parsers, leading to XXE while loading GP6 (.gpx) and GP7 (.gp) tablature files.

Patch / fix

  • tuxguitar Debian 14, Debian 13 1.5.6+dfsg1-7

debian advisories DEBIAN-CVE-2020-14940

  • tuxguitar openSUSE Tumbleweed 1.6.0-2.1

opensuse advisories openSUSE-SU-2024:13324-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-14940 updated cvss 5.3

tuxguitar: XXE in io/gpx/GPXDocumentReader.java

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.68% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • logicaltrust.net https://logicaltrust.net/blog/2020/06/tuxguitar.html referenced PoC, tagged "exploit" by a source, unverified
  • sourceforge.net https://sourceforge.net/p/tuxguitar/bugs/126/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-611 Improper Restriction of XML External Entity Reference

References

Sources

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.