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9.8
CRITICAL CVSS 3.1
CVE-2025-63721
Apache Snakeyaml Deserialization Remote Code Execution
Description

HummerRisk thru v1.5.0 is using a vulnerable Snakeyaml component, allowing attackers with normal user privileges to hit the /rule/add API and thereby achieve RCE and take over the server.

INFO

Published Date :

Dec. 8, 2025, 5:16 p.m.

Last Modified :

Dec. 11, 2025, 3:15 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2025-63721 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Hummerrisk hummerrisk
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH [email protected]
CVSS 3.1 CRITICAL 134c704f-9b21-4f2e-91b3-4a467353bcc0
Solution
Update Snakeyaml to a secure version to prevent RCE.
  • Update the Snakeyaml component to a secure version.
  • Apply vendor patches or updates immediately.
  • Rebuild and redeploy the application.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-63721.

URL Resource
https://gist.github.com/k1ng0fic3/e8c8c9353fff8fa95e2c2952587e9266 Exploit Third Party Advisory
https://github.com/k1ng0fic3/secrisk/blob/main/README.md Exploit Third Party Advisory
https://gist.github.com/k1ng0fic3/e8c8c9353fff8fa95e2c2952587e9266 Exploit Third Party Advisory
https://github.com/k1ng0fic3/secrisk/blob/main/README.md Exploit Third Party Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-63721 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-63721 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-63721 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-63721 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Dec. 11, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Added CWE CWE-502
    Added Reference https://gist.github.com/k1ng0fic3/e8c8c9353fff8fa95e2c2952587e9266
    Added Reference https://github.com/k1ng0fic3/secrisk/blob/main/README.md
  • Initial Analysis by [email protected]

    Dec. 11, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Added CWE NVD-CWE-noinfo
    Added CPE Configuration OR *cpe:2.3:a:hummerrisk:hummerrisk:*:*:*:*:*:*:*:* versions up to (including) 1.5.0
    Added Reference Type MITRE: https://gist.github.com/k1ng0fic3/e8c8c9353fff8fa95e2c2952587e9266 Types: Exploit, Third Party Advisory
    Added Reference Type MITRE: https://github.com/k1ng0fic3/secrisk/blob/main/README.md Types: Exploit, Third Party Advisory
  • CVE Modified by [email protected]

    Dec. 09, 2025

    Action Type Old Value New Value
    Changed Description HummerRisk thru v1.5.0 is using a vulnerable Snakeyaml component allowing attackers to achieve RCE and take over the server. HummerRisk thru v1.5.0 is using a vulnerable Snakeyaml component, allowing attackers with normal user privileges to hit the /rule/add API and thereby achieve RCE and take over the server.
  • New CVE Received by [email protected]

    Dec. 08, 2025

    Action Type Old Value New Value
    Added Description HummerRisk thru v1.5.0 is using a vulnerable Snakeyaml component allowing attackers to achieve RCE and take over the server.
    Added Reference https://gist.github.com/k1ng0fic3/e8c8c9353fff8fa95e2c2952587e9266
    Added Reference https://github.com/k1ng0fic3/secrisk/blob/main/README.md
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 9.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact