A Missing Authentication for Critical Function vulnerability in Juniper Networks Junos OS on EX Series allows an unauthenticated, network-based attacker to cause limited impact to the file system integrity. With a specific request to installAppPackage.php that doesn't require authentication an attacker is able to upload arbitrary files via J-Web, leading to a loss of integrity for a certain part of the file system, which may allow chaining to other vulnerabilities. This issue affects Juniper Networks Junos OS on EX Series: * All versions prior to 20.4R3-S8; * 21.1 versions 21.1R1 and later; * 21.2 versions prior to 21.2R3-S6; * 21.3 versions prior to 21.3R3-S5; * 21.4 versions prior to 21.4R3-S4; * 22.1 versions prior to 22.1R3-S3; * 22.2 versions prior to 22.2R3-S1; * 22.3 versions prior to 22.3R2-S2, 22.3R3; * 22.4 versions prior to 22.4R2-S1, 22.4R3.
This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.3, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts limited integrity, for affected systems. Impacting 64 products from juniper, from juniper, from juniper and 61 others, organizations running these solutions should prioritize assessment and patching.
Reported in 2023, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.
2023-08-17T20:15:10.553
2026-02-26T15:04:01.340
Analyzed
CVSSv3.1: 5.3 (MEDIUM)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | juniper | junos | < 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 20.4 | Yes |
| Operating System | juniper | junos | 21.1 | Yes |
| Operating System | juniper | junos | 21.1 | Yes |
| Operating System | juniper | junos | 21.1 | Yes |
| Operating System | juniper | junos | 21.1 | Yes |
| Operating System | juniper | junos | 21.1 | Yes |
| Operating System | juniper | junos | 21.1 | Yes |
| Operating System | juniper | junos | 21.1 | Yes |
| Operating System | juniper | junos | 21.1 | Yes |
| Operating System | juniper | junos | 21.1 | Yes |
| Operating System | juniper | junos | 21.1 | Yes |
| Operating System | juniper | junos | 21.1 | Yes |
| Operating System | juniper | junos | 21.2 | Yes |
| Operating System | juniper | junos | 21.2 | Yes |
| Operating System | juniper | junos | 21.2 | Yes |
| Operating System | juniper | junos | 21.2 | Yes |
| Operating System | juniper | junos | 21.2 | Yes |
| Operating System | juniper | junos | 21.2 | Yes |
| Operating System | juniper | junos | 21.2 | Yes |
| Operating System | juniper | junos | 21.2 | Yes |
| Operating System | juniper | junos | 21.2 | Yes |
| Operating System | juniper | junos | 21.2 | Yes |
| Operating System | juniper | junos | 21.2 | Yes |
| Operating System | juniper | junos | 21.2 | Yes |
| Operating System | juniper | junos | 21.2 | Yes |
| Operating System | juniper | junos | 21.3 | Yes |
| Operating System | juniper | junos | 21.3 | Yes |
| Operating System | juniper | junos | 21.3 | Yes |
| Operating System | juniper | junos | 21.3 | Yes |
| Operating System | juniper | junos | 21.3 | Yes |
| Operating System | juniper | junos | 21.3 | Yes |
| Operating System | juniper | junos | 21.3 | Yes |
| Operating System | juniper | junos | 21.3 | Yes |
| Operating System | juniper | junos | 21.3 | Yes |
| Operating System | juniper | junos | 21.3 | Yes |
| Operating System | juniper | junos | 21.3 | Yes |
| Operating System | juniper | junos | 21.3 | Yes |
| Operating System | juniper | junos | 21.4 | Yes |
| Operating System | juniper | junos | 21.4 | Yes |
| Operating System | juniper | junos | 21.4 | Yes |
| Operating System | juniper | junos | 21.4 | Yes |
| Operating System | juniper | junos | 21.4 | Yes |
| Operating System | juniper | junos | 21.4 | Yes |
| Operating System | juniper | junos | 21.4 | Yes |
| Operating System | juniper | junos | 21.4 | Yes |
| Operating System | juniper | junos | 21.4 | Yes |
| Operating System | juniper | junos | 21.4 | Yes |
| Operating System | juniper | junos | 21.4 | Yes |
| Operating System | juniper | junos | 22.1 | Yes |
| Operating System | juniper | junos | 22.1 | Yes |
| Operating System | juniper | junos | 22.1 | Yes |
| Operating System | juniper | junos | 22.1 | Yes |
| Operating System | juniper | junos | 22.1 | Yes |
| Operating System | juniper | junos | 22.1 | Yes |
| Operating System | juniper | junos | 22.1 | Yes |
| Operating System | juniper | junos | 22.1 | Yes |
| Operating System | juniper | junos | 22.1 | Yes |
| Operating System | juniper | junos | 22.1 | Yes |
| Operating System | juniper | junos | 22.2 | Yes |
| Operating System | juniper | junos | 22.2 | Yes |
| Operating System | juniper | junos | 22.2 | Yes |
| Operating System | juniper | junos | 22.2 | Yes |
| Operating System | juniper | junos | 22.2 | Yes |
| Operating System | juniper | junos | 22.2 | Yes |
| Operating System | juniper | junos | 22.2 | Yes |
| Operating System | juniper | junos | 22.2 | Yes |
| Operating System | juniper | junos | 22.3 | Yes |
| Operating System | juniper | junos | 22.3 | Yes |
| Operating System | juniper | junos | 22.3 | Yes |
| Operating System | juniper | junos | 22.3 | Yes |
| Operating System | juniper | junos | 22.3 | Yes |
| Operating System | juniper | junos | 22.3 | Yes |
| Operating System | juniper | junos | 22.4 | Yes |
| Operating System | juniper | junos | 22.4 | Yes |
| Operating System | juniper | junos | 22.4 | Yes |
| Operating System | juniper | junos | 22.4 | Yes |
| Operating System | juniper | junos | 22.4 | Yes |
| Hardware | juniper | ex2200 | - | No |
| Hardware | juniper | ex2200-c | - | No |
| Hardware | juniper | ex2200-vc | - | No |
| Hardware | juniper | ex2300 | - | No |
| Hardware | juniper | ex2300-24mp | - | No |
| Hardware | juniper | ex2300-24p | - | No |
| Hardware | juniper | ex2300-24t | - | No |
| Hardware | juniper | ex2300-48mp | - | No |
| Hardware | juniper | ex2300-48p | - | No |
| Hardware | juniper | ex2300-48t | - | No |
| Hardware | juniper | ex2300-c | - | No |
| Hardware | juniper | ex2300m | - | No |
| Hardware | juniper | ex3200 | - | No |
| Hardware | juniper | ex3300 | - | No |
| Hardware | juniper | ex3300-vc | - | No |
| Hardware | juniper | ex3400 | - | No |
| Hardware | juniper | ex4200 | - | No |
| Hardware | juniper | ex4200-vc | - | No |
| Hardware | juniper | ex4300 | - | No |
| Hardware | juniper | ex4300-24p | - | No |
| Hardware | juniper | ex4300-24p-s | - | No |
| Hardware | juniper | ex4300-24t | - | No |
| Hardware | juniper | ex4300-24t-s | - | No |
| Hardware | juniper | ex4300-32f | - | No |
| Hardware | juniper | ex4300-32f-dc | - | No |
| Hardware | juniper | ex4300-32f-s | - | No |
| Hardware | juniper | ex4300-48mp | - | No |
| Hardware | juniper | ex4300-48mp-s | - | No |
| Hardware | juniper | ex4300-48p | - | No |
| Hardware | juniper | ex4300-48p-s | - | No |
| Hardware | juniper | ex4300-48t | - | No |
| Hardware | juniper | ex4300-48t-afi | - | No |
| Hardware | juniper | ex4300-48t-dc | - | No |
| Hardware | juniper | ex4300-48t-dc-afi | - | No |
| Hardware | juniper | ex4300-48t-s | - | No |
| Hardware | juniper | ex4300-48tafi | - | No |
| Hardware | juniper | ex4300-48tdc | - | No |
| Hardware | juniper | ex4300-48tdc-afi | - | No |
| Hardware | juniper | ex4300-mp | - | No |
| Hardware | juniper | ex4300-vc | - | No |
| Hardware | juniper | ex4300m | - | No |
| Hardware | juniper | ex4400 | - | No |
| Hardware | juniper | ex4500 | - | No |
| Hardware | juniper | ex4500-vc | - | No |
| Hardware | juniper | ex4550 | - | No |
| Hardware | juniper | ex4550-vc | - | No |
| Hardware | juniper | ex4550\/vc | - | No |
| Hardware | juniper | ex4600 | - | No |
| Hardware | juniper | ex4600-vc | - | No |
| Hardware | juniper | ex4650 | - | No |
| Hardware | juniper | ex6200 | - | No |
| Hardware | juniper | ex6210 | - | No |
| Hardware | juniper | ex8200 | - | No |
| Hardware | juniper | ex8200-vc | - | No |
| Hardware | juniper | ex8208 | - | No |
| Hardware | juniper | ex8216 | - | No |
| Hardware | juniper | ex9200 | - | No |
| Hardware | juniper | ex9204 | - | No |
| Hardware | juniper | ex9208 | - | No |
| Hardware | juniper | ex9214 | - | No |
| Hardware | juniper | ex9250 | - | No |
| Hardware | juniper | ex9251 | - | No |
| Hardware | juniper | ex9253 | - | No |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For juniper's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.