# CVE-2023-36845: Junos OS: EX and SRX Series: A PHP vulnerability in J-Web allows an unauthenticated to control an important environment variable

> CVE-2023-36845: Junos OS: EX and SRX Series: A PHP vulnerability in J-Web allows an unauthenticated to control an important environment variable. CVSS 9.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2023-36845
Last updated: 2025-10-21T23:05:40Z

- Published: 2023-08-17 19:17 UTC · Updated: 2025-10-21 23:05 UTC · Assigner: juniper
- CVSS: 9.8 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 95.1%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2023-11-13, federal due date 2023-11-17, ransomware use: Unknown
- CWE: CWE-473

## Description

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.

## CISA required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

## Affected vendors and products

- Juniper Networks: Junos OS

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2023-36845)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2023-36845)
- [http://packetstormsecurity.com/files/174865/Juniper-SRX-Firewall-EX-Switch-Remote-Code-Execution.html](http://packetstormsecurity.com/files/174865/Juniper-SRX-Firewall-EX-Switch-Remote-Code-Execution.html)
- [http://packetstormsecurity.com/files/176969/Juniper-SRX-Firewall-EX-Switch-Remote-Code-Execution.html](http://packetstormsecurity.com/files/176969/Juniper-SRX-Firewall-EX-Switch-Remote-Code-Execution.html)
- [https://supportportal.juniper.net/JSA72300](https://supportportal.juniper.net/JSA72300)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2023-36845 · Markdown: https://rewindex.com/cve/CVE-2023-36845.md · JSON: https://rewindex.com/api/v1/cves/CVE-2023-36845 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:09:09.866Z