{"cve":"CVE-2024-21620","nvd":{"published":"2024-01-25T23:15:09.680","modified":"2026-06-17T07:09:51.680","status":"Modified","description":"An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in J-Web of Juniper Networks Junos OS on SRX Series and EX Series allows an attacker to construct a URL that when visited by another user enables the attacker to execute commands with the target's permissions, including an administrator.\n\nA specific invocation of the emit_debug_note method in webauth_operation.php will echo back the data it receives.\n\nThis issue affects Juniper Networks Junos OS on SRX Series and EX Series:\n  *  All versions earlier than 20.4R3-S10;\n  *  21.2 versions earlier than 21.2R3-S8;\n  *  21.4 versions earlier than 21.4R3-S6;\n  *  22.1 versions earlier than 22.1R3-S5;\n  *  22.2 versions earlier than 22.2R3-S3;\n  *  22.3 versions earlier than 22.3R3-S2;\n  *  22.4 versions earlier than 22.4R3-S1;\n  *  23.2 versions earlier than 23.2R2;\n  *  23.4 versions earlier than 23.4R2.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"references":["https://supportportal.juniper.net/JSA76390","https://supportportal.juniper.net/JSA76390"],"products":["juniper:junos"],"source":"nvd","synced_at":"2026-10-19T21:44:57.175229480+00:00"},"epss":{"cve":"CVE-2024-21620","score":0.00908,"percentile":0.59926,"date":"2026-10-31"},"kev":null,"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."]}