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CVE-2023-36845

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…

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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.
CVSS 9.8 (CRITICAL) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.9/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 9.8: +1.47
  • Fresh EPSS: 95.07%: +0.48

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 11 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

GreyNoise
Press · 26 Feb 2025, 08:00 · GreyNoise Detects Active Exploitation of CVEs Mentioned in Black Basta’s Leaked Chat Logs - GreyNoise
Security Affairs
Press · 19 Sep 2023, 07:00 · 12,000 Juniper SRX firewalls and EX switches vulnerable to CVE-2023-36845 - Security Affairs
BleepingComputer
Press · 18 Sep 2023, 07:00 · Thousands of Juniper devices vulnerable to unauthenticated RCE flaw - BleepingComputer
Rapid7
Press · 31 Aug 2023, 07:00 · Exploitation of Juniper Networks SRX Series and EX Series Devices - Rapid7
BleepingComputer
Press · 29 Aug 2023, 07:00 · Hackers exploit critical Juniper RCE bug chain after PoC release - BleepingComputer
See all 11 source documents
Help Net Security
Press · 28 Aug 2023, 07:00 · PoC for no-auth RCE on Juniper firewalls released - Help Net Security
BleepingComputer
Press · 28 Aug 2023, 07:00 · Exploit released for Juniper firewall bugs allowing RCE attacks - BleepingComputer
watchTowr Labs
Press · 25 Aug 2023, 07:00 · CVE-2023-36844 And Friends: RCE In Juniper Devices - watchTowr Labs
iTnews
Press · 21 Aug 2023, 07:00 · Juniper web management interface open to RCE - iTnews
Hong Kong Computer Emergency Response Team Coordination Centre
Press · 21 Aug 2023, 07:00 · Juniper Junos OS Multiple Vulnerabilities - Hong Kong Computer Emergency Response Team Coordination Centre
The Hacker News
Press · 19 Aug 2023, 07:00 · New Juniper Junos OS Flaws Expose Devices to Remote Attacks - Patch Now - The Hacker News

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.9 (2026-11-02 15:13). The curve appears once the score changes.

Public exploit evidence

3

Public exploit entries / repo candidates

See 3 repos with metrics
RepositoryStarsForksLanguageUpdated
kljunowsky/CVE-2023-368455512Python29 Dec 2023, 14:56
cyberh3als/CVE-2023-36845-POC40Python02 Oct 2023, 10:31
0xNehru/CVE-2023-36845-Juniper-Vulnerability10Python14 Feb 2024, 14:07
Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 9.8; EPSS 95.1%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, no prior privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:58:56.083638+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
17 Aug 2023, 19:17
First press mention
19 Aug 2023, 07:00
Added to the CISA KEV catalog
13 Nov 2023, 00:00
Latest press mention
26 Feb 2025, 08:00
Score calculated
05 Nov 2026, 13:58
PoCs on GitHub
3 repositories