How severe is CVE-2020-25464?

CVE-2020-25464 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-25464 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-25464?

CVE-2020-25464 affects Moddable. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-25464?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-25464 published?

CVE-2020-25464 was published on 2020-12-04 and last updated on 2026-06-17.

CVE-2020-25464

CVE-2020-25464 is a high-severity vulnerability in Moddable with a CVSS 3.x base score of 7.5. 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-787.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Moddable
Published: 2020-12-04
Last modified: 2026-06-17

Description

Heap buffer overflow at moddable/xs/sources/xsDebug.c in Moddable SDK before before 20200903. The top stack frame is only partially initialized because the stack overflowed while creating the frame. This leads to a crash in the code sending the stack frame to the debugger.

Frequently asked questions

What is CVE-2020-25464?: Heap buffer overflow at moddable/xs/sources/xsDebug.c in Moddable SDK before before 20200903. The top stack frame is only partially initialized because the stack overflowed while creating the frame. This leads to a crash in the code sending the stack frame to the debugger.
How severe is CVE-2020-25464?: CVE-2020-25464 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-25464 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-25464?: CVE-2020-25464 affects Moddable. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-25464?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-25464 published?: CVE-2020-25464 was published on 2020-12-04 and last updated on 2026-06-17.

References

https://github.com/Moddable-OpenSource/moddable/issues/431

Affected products (1)

cpe:2.3:a:moddable:moddable:*:*:*:*:*:*:*:*

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