How severe is CVE-2018-16492?

CVE-2018-16492 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-2018-16492 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-16492?

CVE-2018-16492 affects Extend Project Extend. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-16492?

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-2018-16492 published?

CVE-2018-16492 was published on 2019-02-01 and last updated on 2026-06-17.

CVE-2018-16492

CVE-2018-16492 is a critical-severity vulnerability in Extend Project Extend 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. The underlying weakness is classified as CWE-74.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-74
Affected product: Extend Project Extend
Published: 2019-02-01
Last modified: 2026-06-17

Description

A prototype pollution vulnerability was found in module extend <2.0.2, ~<3.0.2 that allows an attacker to inject arbitrary properties onto Object.prototype.

Frequently asked questions

What is CVE-2018-16492?: A prototype pollution vulnerability was found in module extend <2.0.2, ~<3.0.2 that allows an attacker to inject arbitrary properties onto Object.prototype.
How severe is CVE-2018-16492?: CVE-2018-16492 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-2018-16492 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-16492?: CVE-2018-16492 affects Extend Project Extend. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-16492?: 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-2018-16492 published?: CVE-2018-16492 was published on 2019-02-01 and last updated on 2026-06-17.

References

https://hackerone.com/reports/381185

Affected products (1)

cpe:2.3:a:extend_project:extend:*:*:*:*:*:node.js:*:*

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