CVE-2020-28439: This affects all versions of package corenlp-js-prefab

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CRITICAL 9.8REMOTEMITIGATE

CVE-2020-28439 is a critical-severity flaw (CVSS 9.8) affecting corenlp-js-prefab. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

This affects all versions of package corenlp-js-prefab. The injection point is located in line 10 in 'index.js.' It depends on a vulnerable package 'corenlp-js-interface.' Vulnerability can be exploited with the following PoC:

Why this priority

Critical severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-78
Published	2020-12-11
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: corenlp-js-prefab project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-12-11 17:15 UTCPublished CVE record published
2026-06-17 03:10 UTCUpdated Record last modified

corenlp-js-prefab project corenlp-js-prefab MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls corenlp-js-prefab

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-28439?

corenlp-js-prefab: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-28439 being exploited?

CVE-2020-28439 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-28439 affect?

CVE-2020-28439 affects corenlp-js-prefab. Severity is critical (CVSS 9.8). This affects all versions of package corenlp-js-prefab. The injection point is located in line 10 in 'index.js.' It depends on a vulnerable package 'corenlp-js-interface.' Vulnerability can be exploited with the following PoC:

How urgent is CVE-2020-28439?

Priority 58/100. Critical severity; Remotely exploitable, no login, no user action

References

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