How severe is CVE-2020-28278?

CVE-2020-28278 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-28278 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-28278?

CVE-2020-28278 affects Shvl Project Shvl. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-28278?

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

When was CVE-2020-28278 published?

CVE-2020-28278 was published on 2020-12-29 and last updated on 2026-06-17.

CVE-2020-28278

CVE-2020-28278 is a critical-severity vulnerability in Shvl Project Shvl with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Shvl Project Shvl
Published: 2020-12-29
Last modified: 2026-06-17

Description

Prototype pollution vulnerability in 'shvl' versions 1.0.0 through 2.0.1 allows an attacker to cause a denial of service and may lead to remote code execution.

Frequently asked questions

What is CVE-2020-28278?: Prototype pollution vulnerability in 'shvl' versions 1.0.0 through 2.0.1 allows an attacker to cause a denial of service and may lead to remote code execution.
How severe is CVE-2020-28278?: CVE-2020-28278 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-28278 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-28278?: CVE-2020-28278 affects Shvl Project Shvl. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-28278?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-28278 published?: CVE-2020-28278 was published on 2020-12-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:shvl_project:shvl:*:*:*:*:*:node.js:*:*