What it is
CVE-2020-15227 is an unauthenticated Remote Code Execution vulnerability affecting nette application. Nette versions before 2.0.19, 2.1.13, 2.2.10, 2.3.14, 2.4.16, 3.0.6 are vulnerable to an code injection attack by...
Vulnerability report
High confidence
Not in CISA KEV
CVE-2020-15227
Remote Code Execution vulnerability
nette / application · >= 2.0.0, < 2.0.19
- Severity
- CVSS 8.7 · High
- Confidence
- High
- Exploit status
- PoC available
- EPSS
- 35.2%
- First observed
- —
- Last observed
- —
Decision summary
What security teams need to know first
Direct answers before the deeper technical record.
Is it exploited?
Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is high.
Who is affected?
nette / application >= 2.0.0, < 2.0.19.
What should we do?
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
Overview
Remote Code Execution vulnerability
Nette versions before 2.0.19, 2.1.13, 2.2.10, 2.3.14, 2.4.16, 3.0.6 are vulnerable to an code injection attack by passing specially formed parameters to URL that may possibly leading to RCE.
Nette is a PHP/Composer MVC Framework.
Vendor
Product
Affected
Status
nette
application
>= 2.0.0, < 2.0.19
Affected
nette
application
>= 2.1.0, < 2.1.13
Affected
nette
application
>= 2.2.0, < 2.2.10
Affected
nette
application
>= 2.3.0, < 2.3.14
Affected
nette
application
>= 2.4.0, < 2.4.16
Affected
nette
application
>= 3.0.0, < 3.0.6
Affected
- Published
- 01 Oct 2020
- Exploitation Reported
- 11 Jul 2025
- Attack vector
- Remote
- Complexity
- High
- Privileges
- None
- User interaction
- None
Tags
nuclei_scanner
CVE References
- [debian-lts-announce] 20210404 [SECURITY] [DLA 2617-1] php-nette security update lists.debian.org · Mailing List https://lists.debian.org/debian-lts-announce/2021/04/msg00003.html
- GitHub — nette/application github.com · CVE Record https://github.com/nette/application/security/advisories/GHSA-8gv3-3j...
- packagist.org/packages/nette/application packagist.org · CVE Record https://packagist.org/packages/nette/application
- packagist.org/packages/nette/nette packagist.org · CVE Record https://packagist.org/packages/nette/nette
Exploitation evidence
Why KEV Intelligence marks this CVE as exploited
Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.
Proof of concept available
GitHub
Public scanner or PoC coverage increases practical exploitability.
Known exploited vulnerability sources
Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| The Shadowserver First | 2025-07-11 00:00 UTC |
Detection
Operational artifacts and observed signals
Make the evidence actionable in scanner, SOC, and edge-control workflows.
Observed signals
- Request targets
- 0
- User-Agents
- 0
Raw values available in Pro and Enterprise.
Scanner coverage
Nuclei template detected 25 Apr 2025.
View Nuclei template (opens in new tab)Virtual patch status
No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.
Learn about virtual patches →Scanner Artifacts
Scanner and exploit-framework references linked to this CVE.
| Scanner | Reference | Detected |
|---|---|---|
| Nuclei | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2020/CVE-2020-15227.yaml | 25 Apr 2025 |
Risk and context
Severity, weaknesses, and research context
CVSS v3.1
8.7
High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
EPSS
35.2%
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
filipsedivy/CVE-2020-15227
github · Created 2020-11-15 15:30:01 UTC · 1 stars
CVE-2020-15227 checker
Nette Framework - Remote Code Execution
nuclei · Created Unknown
Timeline
From disclosure to observed exploitation
-
Added to KEV Intelligence KEV Feed
High-confidence, third-party attested exploitation
-
Nuclei template available
Scanner coverage available
-
Public PoC available
Public proof-of-concept code published
-
CVE published
Vulnerability disclosed publicly
-
CVE ID reserved
Identifier reserved by the CNA
Pro API
Automate this intelligence
Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
- Evidence confidence and provenance
- First-party sensor telemetry
- PoC and scanner references
- Affected versions and enrichment
- Automation-ready JSON delivery
GET /api/v2/pro/kevs/CVE-2020-15227
Free JSON includes basic KEV fields{
"cve_id": "CVE-2020-15227",
"confidence": "High",
"cvss_score": 8.7,
"epss_score": 0.35228,
"exploit_status": {
"exploited_in_the_wild": false,
"active_exploitation_observed": false
},
"sensor_telemetry": { "attempts": 0, "sensors": 0 }
}