How severe is CVE-2018-3750?

CVE-2018-3750 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-2018-3750 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-3750?

CVE-2018-3750 affects Deep Extend Project Deep Extend. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-3750?

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-2018-3750 published?

CVE-2018-3750 was published on 2018-07-03 and last updated on 2026-06-17.

CVE-2018-3750

CVE-2018-3750 is a critical-severity vulnerability in Deep Extend Project Deep 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-20.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Deep Extend Project Deep Extend
Published: 2018-07-03
Last modified: 2026-06-17

Description

The utilities function in all versions <= 0.5.0 of the deep-extend node module can be tricked into modifying the prototype of Object when the attacker can control part of the structure passed to this function. This can let an attacker add or modify existing properties that will exist on all objects.

Frequently asked questions

What is CVE-2018-3750?: The utilities function in all versions <= 0.5.0 of the deep-extend node module can be tricked into modifying the prototype of Object when the attacker can control part of the structure passed to this function. This can let an attacker add or modify existing properties that will exist on all objects.
How severe is CVE-2018-3750?: CVE-2018-3750 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-2018-3750 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-3750?: CVE-2018-3750 affects Deep Extend Project Deep Extend. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-3750?: 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-2018-3750 published?: CVE-2018-3750 was published on 2018-07-03 and last updated on 2026-06-17.

References

https://hackerone.com/reports/311333

Affected products (1)

cpe:2.3:a:deep_extend_project:deep_extend:*:*:*:*:*:node.js:*:*

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