How severe is CVE-2018-20861?

CVE-2018-20861 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-20861 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20861?

CVE-2018-20861 affects Openmpt Libopenmpt. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-20861?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-20861 published?

CVE-2018-20861 was published on 2019-07-30 and last updated on 2026-06-17.

CVE-2018-20861

CVE-2018-20861 is a medium-severity vulnerability in Openmpt Libopenmpt with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Openmpt Libopenmpt
Published: 2019-07-30
Last modified: 2026-06-17

Description

libopenmpt before 0.3.11 allows a crash with certain malformed custom tunings in MPTM files.

Frequently asked questions

What is CVE-2018-20861?: libopenmpt before 0.3.11 allows a crash with certain malformed custom tunings in MPTM files.
How severe is CVE-2018-20861?: CVE-2018-20861 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-20861 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20861?: CVE-2018-20861 affects Openmpt Libopenmpt. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-20861?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-20861 published?: CVE-2018-20861 was published on 2019-07-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:openmpt:libopenmpt:*:*:*:*:*:*:*:*

More vulnerabilities in Openmpt Libopenmpt

CVE-2019-17113 — Critical (CVSS 9.8): In libopenmpt before 0.3.19 and 0.4.x before 0.4.9, ModPlug_InstrumentName and ModPlug_SampleName in…
CVE-2018-11710 — High (CVSS 8.8): soundlib/pattern.h in libopenmpt before 0.3.9 allows remote attackers to cause a denial of service (application crash)…
CVE-2018-6611 — High (CVSS 8.8): soundlib/Load_stp.cpp in OpenMPT through 1.27.04.00, and libopenmpt before 0.3.6, has an out-of-bounds read via a…
CVE-2017-11311 — High (CVSS 7.8): soundlib/Load_psm.cpp in OpenMPT through 1.26.12.00 and libopenmpt before 0.2.8461-beta26 has a heap buffer overflow…
CVE-2019-14381 — High (CVSS 7.5): libopenmpt before 0.4.3 allows a crash due to a NULL pointer dereference when doing a portamento from an OPL instrument…
CVE-2019-14383 — Medium (CVSS 6.5): J2B in libopenmpt before 0.4.2 allows an assertion failure during file parsing with debug STLs.

All CVEs affecting Openmpt Libopenmpt →

Other CWE-20 (Improper Input Validation) vulnerabilities

CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →