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Instantcms CVE-2024-31213

MEDIUM
URL Redirection to Untrusted Site (Open Redirect) (CWE-601)
2024-04-05 security-advisories@github.com
5.4
CVSS 3.1 · NVD
View

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V3 - Web Frontend Security Redirect URL validation
MITRE ATT&CK

1 technique across 1 tactic: Initial Access

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 redirect users to malicious websites via URL manipulation 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 0.4% exploitation probability (EPSS)

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AnalysisAI

InstantCMS is a free and open source content management system. 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. Validate redirect destinations against an allowlist, avoid using user input in redirect URLs.

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 Open Redirect (CWE-601), which allows attackers to redirect users to malicious websites via URL manipulation. InstantCMS is a free and open source content management system. An open redirect was found in the ICMS2 application version 2.16.2 when being redirected after modifying one's own user profile. An attacker could trick a victim into visiting their web application, thinking they are still present on the ICMS2 application. They could then host a website stating "To update your profile, please enter your password," upon which the user may type their password and send it to the attacker. As of time of publication, a patched version is not available. Affected products include: Instantcms. Version information: version 2.16.2.

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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

InstantCMS is a free and open source content management system. An open redirect was found in the ICMS2 application version 2.16.2 when being redirected after modifying one's own user profile. An attacker could trick a victim into visiting their web application, thinking they are still present on the ICMS2 application. They could then host a website stating "To update your profile, please enter your password," upon which the user may type their password and send it to the attacker. As of time of publication, a patched version is not available.

Threat Intelligence Overview

EPSS Score
0.4%
Top 68% 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 0.4%
Patch available No
Active threat No
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

47
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +27
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Affected Products (CPE)NVD

cpe:2.3:a:instantcms:instantcms:*:*:*:*:*:*:*:*
CVE-2013-10051 CRITICAL POC
9.3 Aug 01

A remote PHP code execution vulnerability exists in InstantCMS version 1.6 and earlier due to unsafe use of eval() withi

CVE-2023-4188 CRITICAL POC
9.1 Aug 05

SQL Injection in GitHub repository instantsoft/icms2 prior to 2.16.1-git. Rated critical severity (CVSS 9.1), this vulne

CVE-2013-6839 HIGH POC
7.5 Dec 13

SQL injection vulnerability in InstantSoft InstantCMS 1.10.3 and earlier allows remote attackers to execute arbitrary SQ

CVE-2024-31212 HIGH POC
7.2 Apr 04

InstantCMS is a free and open source content management system. Rated high severity (CVSS 7.2), this vulnerability is re

CVE-2023-4928 HIGH POC
7.2 Sep 13

SQL Injection in GitHub repository instantsoft/icms2 prior to 2.16.1. Rated high severity (CVSS 7.2), this vulnerability

CVE-2023-4655 MEDIUM POC
6.1 Aug 31

Cross-site Scripting (XSS) - Reflected in GitHub repository instantsoft/icms2 prior to 2.16.1. Rated medium severity (CV

CVE-2018-14382 MEDIUM POC
6.1 Jul 18

InstantCMS 2.10.1 has /redirect?url= XSS. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable,

CVE-2024-50348 MEDIUM POC
5.4 Oct 29

InstantCMS is a free and open source content management system. Rated medium severity (CVSS 5.4), this vulnerability is

CVE-2023-4878 MEDIUM POC
5.4 Sep 10

Server-Side Request Forgery (SSRF) in GitHub repository instantsoft/icms2 prior to 2.16.1-git. Rated medium severity (CV

CVE-2023-4652 MEDIUM POC
5.4 Aug 31

Cross-site Scripting (XSS) - Stored in GitHub repository instantsoft/icms2 prior to 2.16.1-git. Rated medium severity (C

CVE-2023-4651 MEDIUM POC
5.4 Aug 31

Server-Side Request Forgery (SSRF) in GitHub repository instantsoft/icms2 prior to 2.16.1. Rated medium severity (CVSS 5

CVE-2023-4649 MEDIUM POC
5.4 Aug 31

Session Fixation in GitHub repository instantsoft/icms2 prior to 2.16.1. Rated medium severity (CVSS 5.4), this vulnerab

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