CVE-2020-19695

⛔ critical

Summary

Buffer Overflow found in Nginx NJS allows a remote attacker to execute arbitrary code via the njs_object_property parameter of the njs/njs_vm.c function.

CVSS Score

9.8

Critical

EPSS Score

1.4

Exploit Probability

Published Date

2023-04-04

First Seen: 2026-01-05

📊 Relative Risk Intelligence

This CVE is Very High Risk - more severe than 90.5% of all 326,604 vulnerabilities in our database.

#31,067

Top 10% most severe

Severity Percentile

🎯 CISA SSVC Assessment Updated: Feb 14, 2025

🔍 Exploitation Status

Poc

Proof-of-concept available

⚙️ Automatable

YES

Can be exploited automatically

💥 Technical Impact

Total

Complete system compromise possible

SSVC data provided by CISA

Last Modified 2025-08-12

Source NVD 🔗

CVSS Vector 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE IDs (Weakness Types)

CWE-120

📦 Affected Products 1

Vendor	Product	Status	Affected Versions
f5	njs	Affected	< 0.3.4

🔗 References 1

https://github.com/nginx/njs/issues/188

Exploit Issue Tracking Patch

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-8711	⚠️ high	8.1	0.1	NGINX JavaScript has a vulnerability when the js_fetch_proxy directive is configured with at least one client-controlle...	2026-05-19
CVE-2023-27727	⚠️ high	7.5	0.1	Nginx NJS v0.7.10 was discovered to contain a segmentation violation via the function njs_function_frame at src/njs_func...	2023-04-09
CVE-2023-27728	⚠️ high	7.5	0.1	Nginx NJS v0.7.10 was discovered to contain a segmentation violation via the function njs_dump_is_recursive at src/njs_v...	2023-04-09
CVE-2023-27729	⚠️ high	7.5	0.1	Nginx NJS v0.7.10 was discovered to contain an illegal memcpy via the function njs_vmcode_return at src/njs_vmcode.c.	2023-04-09
CVE-2023-27730	⚠️ high	7.5	0.1	Nginx NJS v0.7.10 was discovered to contain a segmentation violation via the function njs_lvlhsh_find at src/njs_lvlhsh....	2023-04-09
CVE-2020-19692	⛔ critical	9.8	1.3	Buffer Overflow vulnerabilty found in Nginx NJS v.0feca92 allows a remote attacker to execute arbitrary code via the njs...	2023-04-04

These CVEs affect the same products