--- title: "CVE-2023-36845: Junos OS: EX and SRX Series: A PHP… | CubePath" description: "A PHP External Variable Modification vulnerability in J-Web of Juniper Networks Junos OS on EX Series and SRX Series allows an unauthenticated…" language: en source: https://cubepath.com/security/cve/CVE-2023-36845 --- # CVE-2023-36845: Junos OS: EX and SRX Series: A PHP… | CubePath ## 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. Official description from the CVE record, published by juniper. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2023-36845) ## Key data ### CVSS 3.1 Critical 9.8 Score published by juniper in the CVE record. CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | Metric | Value | What it means | | ---------------------- | --------- | ----------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. | | Privileges required | None | No account or privileges are needed. | | User interaction | None | No action from any user is needed. | | Scope | Unchanged | The impact stays within the vulnerable component. | | Confidentiality impact | High | Serious or total effect on the secrecy of data. | | Integrity impact | High | Serious or total effect on the trustworthiness of data. | | Availability impact | High | Serious or total effect on availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.95070 (95.1% probability) Percentile 99.9% Scores of Nov 10, 2026 Model v2026.06.15 ### CISA Known Exploited Vulnerabilities This CVE is listed in the CISA KEV catalog. Name in the catalog Juniper Junos OS EX Series and SRX Series PHP External Variable Modification Vulnerability Added to the catalog Nov 13, 2023 Federal due date Nov 17, 2023 ### CISA assessment as of Nov 15, 2023 Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA. Exploitation Recorded by CISA as active Automatable yes Technical impact total ### Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-473](https://cwe.mitre.org/data/definitions/473.html) PHP External Variable Modification ## Affected products Products listed in the CVE record, as the CNA published them. - Juniper Networks Junos OS - affected: before 20.4R3-S9 - affected: 21.1 up to before 21.1\* - affected: 21.2 up to before 21.2R3-S7 - affected: 21.3 up to before 21.3R3-S5 - affected: 21.4 up to before 21.4R3-S5 - affected: 22.1 up to before 22.1R3-S4 - affected: 22.2 up to before 22.2R3-S2 - affected: 22.3 up to before 22.3R2-S2, 22.3R3-S1 - affected: 22.4 up to before 22.4R2-S1, 22.4R3 - affected: 23,2 up to before 23.2R1-S1, 23.2R2 ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [supportportal.juniper.net/JSA72300](https://supportportal.juniper.net/JSA72300) vendor-advisory mitigation - [packetstormsecurity.com/files/174865/Juniper-SRX-Firewall-E…](http://packetstormsecurity.com/files/174865/Juniper-SRX-Firewall-EX-Switch-Remote-Code-Execution.html) - [packetstormsecurity.com/files/176969/Juniper-SRX-Firewall-E…](http://packetstormsecurity.com/files/176969/Juniper-SRX-Firewall-EX-Switch-Remote-Code-Execution.html) ## Timeline 1. ID reserved Jun 27, 2023 2. Record published Aug 17, 2023 3. Added to CISA KEV Nov 13, 2023 4. Record last updated Oct 21, 2025 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:02 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)