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Rconfig CVE-2020-12256

MEDIUM
Cross-site Scripting (XSS) (CWE-79)
2020-05-18 cve@mitre.org
5.4
CVSS 3.1 · NVD
View

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK

2 techniques across 2 tactics: Initial Access, Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

CVSS score of 5.4 (MEDIUM). Attack characteristics: network attack vector, low complexity, low privileges required, user interaction required. Public proof-of-concept exploit code is available.

Exploit ScenarioDerived

A remote attacker could inject malicious scripts into web pages viewed by other users by sending crafted requests to the affected application.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 95.8% exploitation probability (EPSS)

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AnalysisAI

rConfig 3.9.4 is vulnerable to reflected XSS. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. rConfig 3.9.4 is vulnerable to reflected XSS. The devicemgmnt.php file improperly validates user input. An attacker can exploit this by crafting arbitrary JavaScript in the deviceId GET parameter to devicemgmnt.php. Affected products include: Rconfig.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 5.4 MEDIUM
AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

DescriptionNVD

rConfig 3.9.4 is vulnerable to reflected XSS. The devicemgmnt.php file improperly validates user input. An attacker can exploit this by crafting arbitrary JavaScript in the deviceId GET parameter to devicemgmnt.php.

Threat Intelligence Overview

EPSS Score
95.8%
Top 0% exploitable
Exploit
POC
Public exploit code exists
Data Quality
3 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC Yes
EPSS 95.8%
Patch available No
Active threat Yes
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
Poc
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

143
Low Medium High Critical
KEV: 0
EPSS: +96
CVSS: +27
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.

Affected Products (CPE)NVD

cpe:2.3:a:rconfig:rconfig:3.9.4:*:*:*:*:*:*:*
CVE-2020-10221 HIGH POC
8.8 Mar 08

lib/ajaxHandlers/ajaxAddTemplate.php in rConfig through 3.94 allows remote attackers to execute arbitrary OS commands vi

CVE-2020-10220 CRITICAL POC
9.8 Mar 07

An issue was discovered in rConfig through 3.9.4. Rated critical severity (CVSS 9.8), this vulnerability is remotely exp

CVE-2019-16662 CRITICAL POC
9.8 Oct 28

An issue was discovered in rConfig 3.9.2. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable

CVE-2022-44384 HIGH POC
8.8 Nov 17

An arbitrary file upload vulnerability in rconfig v3.9.6 allows attackers to execute arbitrary code via a crafted PHP fi

CVE-2020-13638 CRITICAL POC
9.8 Nov 13

lib/crud/userprocess.php in rConfig 3.9.x before 3.9.7 has an authentication bypass, leading to administrator account cr

CVE-2020-10549 CRITICAL POC
9.8 Jun 04

rConfig 3.9.4 and previous versions has unauthenticated snippets.inc.php SQL injection. Rated critical severity (CVSS 9.

CVE-2020-10548 CRITICAL POC
9.8 Jun 04

rConfig 3.9.4 and previous versions has unauthenticated devices.inc.php SQL injection. Rated critical severity (CVSS 9.8

CVE-2020-10547 CRITICAL POC
9.8 Jun 04

rConfig 3.9.4 and previous versions has unauthenticated compliancepolicyelements.inc.php SQL injection. Rated critical s

CVE-2020-10546 CRITICAL POC
9.8 Jun 04

rConfig 3.9.4 and previous versions has unauthenticated compliancepolicies.inc.php SQL injection. Rated critical severit

CVE-2020-10879 CRITICAL POC
9.8 Mar 23

rConfig before 3.9.5 allows command injection by sending a crafted GET request to lib/crud/search.crud.php since the nod

CVE-2021-29004 HIGH POC
8.8 Oct 11

rConfig 3.9.6 is affected by SQL Injection. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable,

CVE-2021-29005 HIGH POC
8.8 Oct 11

Insecure permission of chmod command on rConfig server 3.9.6 exists. Rated high severity (CVSS 8.8), this vulnerability

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