How should we interpret CVSS severity scores?

CVSS estimates technical severity, but it does not automatically equal business risk. Prioritize using context like internet exposure, asset criticality, known exploitation, and whether compensating controls exist. A Medium CVSS on an exposed production system can be more urgent than a Critical on an isolated non-production host.

Vulnerability Database

Q: What is a Vulnerability (CVE) and why does it matter?

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

Q: What's the difference between a vulnerability, an exploit, and a zero-day?

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. Risk increases sharply when exploitation becomes reliable or widespread.

Q: Why do vulnerabilities keep reappearing in our environment?

Recurring findings usually come from incomplete asset discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host.

Q: How do we prioritize remediation without burning out the team?

Use a repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress so remediation is steady, not reactive.

Q: How can SynScan help reduce vulnerability risk over time?

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.

413,830

Total vulnerabilities in the database

PocketMine-MP: Player entities can still die and drop items in flaggedForDespawn state — pocketmine / pocketmine-mp

Improper Control of a Resource Through its Lifetime

Summary

When an entity dies, the entity is flagged for despawn, but remains in the World's entity table, meaning it's still accessible by doing World->getEntity($entityId) and other methods. The same is true of a player when quitting the server.

When a network packet arrives from a client to attack an entity, the handler fetches the entity using World->getEntity($entityId) without any checks if the entity is already marked for despawning. Depending on the timing, the entity in question might already be in the flagged-for-despawn state when the action is processed. This means that the death handler for the entity might be run multiple times, causing loot and XP to be dropped multiple times, among other potential side effects.

Reproducing steps

To reproduce this vulnerability, two clients (Player A and Player B) are required.

Prerequisites: - Player A (Victim): Must have the valuable items to be duplicated in their inventory and 1 HP (to ensure instant death). - Player B (Attacker): Must be equipped with a weapon capable of dealing at least 1 damage.

Steps: 1. Player A and Player B stand next to each other. 2. Player A initiates the disconnect sequence (e.g., clicking "Disconnect" or "Exit to Menu"). 3. Immediately after Player A triggers the disconnect (within a split-second window), Player B must attack and kill Player A. 4. Player A's character dies server-side, and their inventory drops on the ground. 5. Player B collects the dropped items. 6. Player A logs back into the server. 7. Result: Player A still possesses the original items in their inventory, while Player B holds the dropped copies.

Patches

The issue was fixed in https://github.com/pmmp/PocketMine-MP/commit/c0719b76b18f2508143134e79bc9f1aa39109683 by adding checks for flagged-for-despawn entities in several affected locations.

While a cleaner fix would be to have World's various entity accessing methods exclude flagged-for-despawn entities, this was deemed too risky for 5.x as it would require significant internal changes.

Workarounds

Plugins can mitigate this issue on older versions by handling EntityDamageByEntityEvent, checking if the victim entity is flagged for despawn, and if so, cancelling the event.

Published: Apr 6, 2026
Updated: Apr 7, 2026
GHSA: GHSA-f9jp-856v-8642
Severity: Low
Exploit:
CISA KEV:

CVSS v3:

Severity: Low
Score: 3.7
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

CWEs:

CWE-664

Affected Software
References

Software	Affected versions
pocketmine / pocketmine-mp	`< 5.39.2`

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Frequently Asked Questions

What is a Vulnerability (CVE) and why does it matter?

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.