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CVE-2023-36844

CWE-473

High

76.7

RPS

Description

A PHP External Variable Modification vulnerability in J-Web of Juniper Networks Junos OS on EX Series allows an unauthenticated, network-based attacker to control certain, important environment variables. Using a crafted request an attacker is able to modify certain PHP environment variables leading to partial loss of integrity, which may allow chaining to other vulnerabilities. This issue affects Juniper Networks Junos OS on EX Series: * All versions prior to 20.4R3-S9; * 21.1 versions 21.1R1 and later; * 21.2 versions prior to 21.2R3-S7; * 21.3 versions prior to 21.3R3-S5; * 21.4 versions prior to 21.4R3-S5; * 22.1 versions prior to 22.1R3-S4; * 22.2 versions prior to 22.2R3-S2; * 22.3 versions prior to 22.3R3-S1; * 22.4 versions prior to 22.4R2-S2, 22.4R3; * 23.2 versions prior to 23.2R1-S1, 23.2R2.

Source: NVD

Signals

CVSS
5.3
Medium · v3.1
EPSS
89.95%
Probability of exploitation in the next 30 days (FIRST)
CISA KEV
In CISA KEV since Nov 2023
Fix commit
No known fix commit
Sources: MoreFixes, FreshFixes
Weakness
CWE-473
Published
17 Aug 2023
Last modified 24 Oct 2025

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Data as of 7 Oct 2026, 05:16 UK time

CVE-2023-36844 · RPS 76.7 · DevSecure Intelligence