CVE Watchtower

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CVE-2023-36845NVD

Vulnerability Summary

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.
Severity Level
CRITICAL(9.8)
Published Date
Aug 17, 2023
Last Modified
Oct 21, 2025
PoC
Available(Metasploit, Nuclei)
Exploitation Status
ACTIVE
EPSS Score (30-Day)
Data Pending
Root Weakness (CWE)
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.
CVSS v3.1 Base Metrics — Score 9.8 (CRITICAL)
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • Juniper Networks Junos OS < 20.4R3-S9
  • Juniper Networks Junos OS >= 21.1 and < 21.1*
  • Juniper Networks Junos OS >= 21.2 and < 21.2R3-S7
  • Juniper Networks Junos OS >= 21.3 and < 21.3R3-S5
  • Juniper Networks Junos OS >= 21.4 and < 21.4R3-S5
  • Juniper Networks Junos OS >= 22.1 and < 22.1R3-S4
  • Juniper Networks Junos OS >= 22.2 and < 22.2R3-S2
  • Juniper Networks Junos OS >= 22.3 and < 22.3R2-S2, 22.3R3-S1
  • Juniper Networks Junos OS >= 22.4 and < 22.4R2-S1, 22.4R3
  • Juniper Networks Junos OS >= 23,2 and < 23.2R1-S1, 23.2R2
Patched Versions
  • Juniper Networks Junos OS 20.4R3-S9
  • Juniper Networks Junos OS 21.1*
  • Juniper Networks Junos OS 21.2R3-S7
  • Juniper Networks Junos OS 21.3R3-S5
  • Juniper Networks Junos OS 21.4R3-S5
  • Juniper Networks Junos OS 22.1R3-S4
  • Juniper Networks Junos OS 22.2R3-S2
  • Juniper Networks Junos OS 22.3R2-S2, 22.3R3-S1
  • Juniper Networks Junos OS 22.4R2-S1, 22.4R3
  • Juniper Networks Junos OS 23.2R1-S1, 23.2R2
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🎁7-Day Free Trial — Try Pro or Team, no card required.
📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
📈EPSS Spike Alerts — Catch rising risk before it peaks.
🎯Custom EPSS/CVSS — Filter noise, focus on risk.
🛡️Exploit Intel — A 2nd confirmed-exploit signal beyond KEV.
🐙GitHub Issues — Auto-tracked, no duplicates.
📬Weekly Digest — One clean summary, not inbox spam.
🏷️Watchlist Groups — Tag alerts by team (Infra/AppSec/SOC).
💬Webhooks — Slack & Teams integration.
🔀Smart Routing — Critical alerts to one channel, rest to another.
🚫Ad-Free — Uninterrupted experience.