CVE-2020-14940Public exploitNetwork attack vector

Local file disclosure via XXE in GPX parser

Published Jun 23, 2020 · Updated Aug 4, 2024

Improper restriction of XML external entity reference in TuxGuitar 1.5.4 allows remote attackers to read local files via malicious GP6 or GP7 tablatures. GPXDocumentReader parses the embedded score.gpif XML with a default DocumentBuilderFactory that permits external entities and remote DTD retrieval, allowing attacker-controlled entities to resolve file and network URLs. Exploitation requires a victim to open a crafted tablature; observed effects include local-file disclosure, internal-service requests, and IP-address leakage, with parsing errors likely visible to the victim.

CVSS severity7.5
High
EPSS probability3.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper restriction of XML external entity reference in TuxGuitar 1.5.4 allows remote attackers to read local files via malicious GP6 or GP7 tablatures. GPXDocumentReader parses the embedded score.gpif XML with a default DocumentBuilderFactory that permits external entities and remote DTD retrieval, allowing attacker-controlled entities to resolve file and network URLs. Exploitation requires a victim to open a crafted tablature; observed effects include local-file disclosure, internal-service requests, and IP-address leakage, with parsing errors likely visible to the victim.

The record

CVE
CVE-2020-14940
Published
Jun 23, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-611, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 23, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.0NVDAV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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