What is the CVSS score of CVE-2024-31221?

CVE-2024-31221 has a CVSS 3.1 base score of 5.9 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:L. EPSS exploitation probability: 0.5%.

Is there a public PoC exploit available for CVE-2024-31221?

Yes, a public proof-of-concept exploit is available for CVE-2024-31221. Prioritise patching immediately. EPSS: 0.5%.

Is there a patch available for CVE-2024-31221?

Yes, a patch is available for CVE-2024-31221. Update the affected software to the latest version immediately.

Sunshine CVE-2024-31221

MEDIUM

Session Fixation (CWE-384)

2024-04-08 security-advisories@github.com

Information Disclosure Session Fixation Sunshine Lizardbyte

5.9

CVSS 3.1 · Vendor: github

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Vulnerability Assessment

Weakness	CWE CWE-384 OWASP Top 10:2025 A07:2025 - Authentication Failures ASVS 5.0 V7 - Session Management Session fixation prevention
Impact	CVSS score of 5.9 (MEDIUM). Attack characteristics: network attack vector, high complexity, low privileges required, user interaction required. Public proof-of-concept exploit code is available.
Exploit ScenarioDerived	This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

Patch available 0.5% exploitation probability (EPSS)

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AnalysisAI

Sunshine is a self-hosted game stream host for Moonlight. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable. Public exploit code available.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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Technical ContextAI · show details

This vulnerability is classified under CWE-384. Sunshine is a self-hosted game stream host for Moonlight. Starting in version 0.10.0 and prior to version 0.23.0, after unpairing all devices in the web UI interface and then pairing only one device, all of the previously devices will be temporarily paired. Version 0.23.0 contains a patch for the issue. As a workaround, restarting Sunshine after unpairing all devices prevents the vulnerability. Affected products include: Lizardbyte Sunshine. Version information: version 0.10.0.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (github) PRIMARY 5.9 MEDIUM

AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:L

Primary rating from Vendor (github) · only source for this CVE.

CVSS VectorVendor: github

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

Low

Availability

Low

DescriptionCVE.org

Sunshine is a self-hosted game stream host for Moonlight. Starting in version 0.10.0 and prior to version 0.23.0, after unpairing all devices in the web UI interface and then pairing only one device, all of the previously devices will be temporarily paired. Version 0.23.0 contains a patch for the issue. As a workaround, restarting Sunshine after unpairing all devices prevents the vulnerability.

Threat Intelligence Overview

EPSS Score

0.5%

Top 60% exploitable

Exploit

POC

Public exploit code exists

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

GitHub

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 0.5%

Patch available Yes

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

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +1

CVSS: +30

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.