CVE-2023-36844
Juniper Junos OS EX Series PHP External Variable Modification Vulnerability
MITRE ATT&CK techniques
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Summary
Juniper Junos OS on EX Series contains a PHP external variable modification vulnerability that 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.
Affected software
Vendor: Juniper · Product: Junos OS
Weakness types (CWE):
What to do
This vulnerability appears in CISA's Known Exploited Vulnerabilities catalog, meaning it is being exploited in the wild. Prioritize patching affected systems and verify exposure across your estate.
Related vulnerabilities in Juniper
| CVE | Name | EPSS | Exploited |
|---|---|---|---|
| CVE-2023-36846 | Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnera | 94.2% | Yes |
| CVE-2023-36845 | Juniper Junos OS EX Series and SRX Series PHP External Variable Modification Vul | 94.2% | Yes |
| CVE-2023-36847 | Juniper Junos OS EX Series Missing Authentication for Critical Function Vulnerab | 84.7% | Yes |
| CVE-2015-7755 | Juniper ScreenOS Improper Authentication Vulnerability | 61.4% | Yes |
| CVE-2020-1631 | Juniper Junos OS Path Traversal Vulnerability | 4.7% | Yes |
| CVE-2025-21590 | Juniper Junos OS Improper Isolation or Compartmentalization Vulnerability | 1.7% | Yes |
| CVE-2023-36851 | Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnera | 1.1% | Yes |
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