CVE-2023-36845
Junos OS: EX and SRX Series: A PHP vulnerability in J-Web allows an unauthenticated to control an important environment variable
- Published
- Aug 17, 2023
- Updated
- Oct 21, 2025
- Assigning CNA
- juniper
- Evidence observed
- Nov 13, 2023
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HHigh · next 30 days
- Percentile
- 99.9%
- Model date
- Oct 17, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
A PHP External Variable Modification vulnerability in J-Web of Juniper Networks Junos OS on EX Series and SRX Series allows an unauthenticated, network-based attacker to remotely execute code. Using a crafted request which sets the variable PHPRC an attacker is able to modify the PHP execution environment allowing the injection und execution of code. This issue affects Juniper Networks Junos OS on EX Series and SRX 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 22.3R2-S2, 22.3R3-S1; * 22.4 versions prior to 22.4R2-S1, 22.4R3; * 23.2 versions prior to 23.2R1-S1, 23.2R2.
Sources
modules/exploits/freebsd/http/junos_phprc_auto_prepend_file.rb
Metasploit Framework modulesDeclared conditions
- platform: PHP,Unix($.exploit_freebsd/http/junos_phprc_auto_prepend_file.platform)
- verification: check_declared($.exploit_freebsd/http/junos_phprc_auto_prepend_file.check)
http/cves/2023/CVE-2023-36845.yaml
Nuclei TemplatesDeclared conditions
- network: http($.protocol_keys)
- verification: regex,status,word($.matchers[*].type)
Responsible use
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