{"cve":"CVE-2023-36844","nvd":{"published":"2023-08-17T20:15:10.267","modified":"2026-06-17T06:07:12.573","status":"Analyzed","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.\n\nUsing a crafted request an attacker is able to modify \n\ncertain PHP environment variables leading to partial loss of integrity, which may allow chaining to other vulnerabilities.\nThis issue affects Juniper Networks Junos OS on EX Series:\n\n\n\n  *  All versions prior to 20.4R3-S9;\n  *  21.1 versions 21.1R1 and later;\n  *  21.2 versions prior to 21.2R3-S7;\n  *  21.3 versions \n\nprior to \n\n 21.3R3-S5;\n  *  21.4 versions \n\nprior to \n\n21.4R3-S5;\n  *  22.1 versions \n\nprior to \n\n22.1R3-S4;\n  *  22.2 versions \n\nprior to \n\n22.2R3-S2;\n  *  22.3 versions \n\nprior to 22.3R3-S1;\n  *  22.4 versions \n\nprior to \n\n22.4R2-S2, 22.4R3;\n  *  23.2 versions prior to \n\n23.2R1-S1, 23.2R2.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","score":5.3},"cwes":["CWE-473"],"references":["http://packetstormsecurity.com/files/174865/Juniper-SRX-Firewall-EX-Switch-Remote-Code-Execution.html","https://supportportal.juniper.net/JSA72300","http://packetstormsecurity.com/files/174865/Juniper-SRX-Firewall-EX-Switch-Remote-Code-Execution.html","https://supportportal.juniper.net/JSA72300","https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-36844"],"products":["juniper:junos"],"source":"nvd","synced_at":"2026-10-19T21:39:14.809778102+00:00"},"epss":{"cve":"CVE-2023-36844","score":0.89958,"percentile":0.99793,"date":"2026-10-31"},"kev":{"cve":"CVE-2023-36844","date_added":"2023-11-13","due_date":"2023-11-17","vendor":"Juniper","product":"Junos OS","known_ransomware":false},"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}