VULNpocalypse

CVE-2025-24016: Wazuh Server Deserialization of Untrusted Data Vulnerability

Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.

Generated by VEDAS. Scores as of 2026-11-01 19:19 UTC. Rebuilt every few hours from cve-scores, CISA KEV and vedas-signatures. How this works and its limits.

What it is

Wazuh is a free and open source platform used for threat prevention, detection, and response. Starting in version 4.4.0 and prior to version 4.9.1, an unsafe deserialization vulnerability allows for remote code execution on Wazuh servers. DistributedAPI parameters are a serialized as JSON and deserialized using `as_wazuh_object` (in `framework/wazuh/core/cluster/common.py`). If an attacker manages to inject an unsanitized dictionary in DAPI request/response, they can forge an unhandled exception (`__unhandled_exc__`) to evaluate arbitrary python code. The vulnerability can be triggered by anybody with API access (compromised dashboard or Wazuh servers in the cluster) or, in certain configurations, even by a compromised agent. Version 4.9.1 contains a fix.

Description quoted from the CVE record (assigned by GitHub_M, published 2025-02-10).

Weakness: CWE-502: Deserialization of Untrusted Data

How it can be exploited

Exploitable over the network with low attack complexity needing low privileges and no user interaction. Impact: confidentiality low, integrity high, availability high. CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H

CISA assessment (SSVC): CISA assesses exploitation as active. Automatable: no. Technical impact: total.

On CISA KEV since
2025-06-10
US federal deadline
2025-07-01
Ransomware use
Not known

Public exploit evidence (Exploit Observer)

Also known as: BDU:2025-01366, CNNVD-202502-781, EUVD-2025-3595, GHSA-hcrc-79hj-m3qh, SNYK-UNMANAGED-WAZUHWAZUH-10292124

VEDAS cluster: VEDAS:COVERTGALE

Exploit Observer links 13 pieces of public exploit code or detection modules that name this CVE or one of its aliases.

Exploit code and modules (13)

Code that names this CVE. A repository can be a working exploit, a scanner, a fake or malware; read it before running anything.

Vulnerability databases and vendor advisories (10)

Catalogue entries, not exploit evidence.

330 more references returned by Exploit Observer did not name this CVE or an alias, so they are left out.

VEDAS data as of 2026-11-01T17:12 UTC; fetched 2026-11-02.

Live scores

EPSS
0.938
very likely to be attacked soon
VEDAS
0.979
strong exploit evidence
On CISA KEV
Yes, since 2025-06-10
Detection rule
Nuclei · Suricata
EPSS (chance of attack)
10No cve-scores data 2026-02-22 to 2026-08-08no data0.1Added to CISA KEV 2025-06-10CVE-2025-24016 EPSS over time2025-042026-11-01
VEDAS (exploit evidence)
10No cve-scores data 2026-02-22 to 2026-08-08no data0.9Added to CISA KEV 2025-06-10CVE-2025-24016 VEDAS over time2025-042026-11-01

Thin horizontal line: the “likely” (EPSS 0.10) or “strong” (VEDAS 0.90) threshold. Shaded “no data” areas are periods when cve-scores did not publish. The vertical line is the day CISA added it to its exploited list.

Who is affected

ProductAffectedNot affected
wazuh wazuhversion >= 4.4.0, < 4.9.1Not stated

Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.

Exploit Observer also maps it to: wazuh wazuh.

How to fix it

CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Vendor guidance:

How to detect it

Nuclei template (active check)

Wazuh - Insecure Deserialization

Wazuh is a free and open source platform used for threat prevention, detection, and response. Starting in version 4.4.0 and prior to version 4.9.1, an unsafe deserialization vulnerability allows for remote code execution on Wazuh servers.

Name and description quoted from the template, written by VEDAS.

The template sends 2 requests (GET /, POST /security/user/authenticate/run_as); it decides using status, word matchers. Severity in the template: critical. Marked as not yet verified against a live vulnerable target.

Run it against a host you own or are authorised to test:

bash
nuclei -u https://your-host -t CVE-2025-24016.yaml
Show the template (59 lines)
yaml
id: CVE-2025-24016

info:
  name: Wazuh - Insecure Deserialization
  author: vedas-arpsyndicate
  severity: critical
  description: |
    Wazuh is a free and open source platform used for threat prevention, detection, and response. Starting in
    version 4.4.0 and prior to version 4.9.1, an unsafe deserialization vulnerability allows for remote code
    execution on Wazuh servers.
  reference:
    - https://www.exploit.observer/?keyword=CVE-2025-24016&match=exact
    - https://subdomain.center/?engine=ammonites&keyword=wazuh&match=exact
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
    cvss-score: 9.9
    cve-id: CVE-2025-24016
    cwe-id: CWE-502
  metadata:
    verified: false
  tags: cve,cve2025,wazuh,deserialization,rce,authenticated,kev,vkev,vuln
flow: http(1) && http(2)

variables:
  payload: '{"__unhandled_exc__":{"__class__": "NotARealClass", "__args__": []}}'

http:
  - raw:
      - |
        GET / HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: word
        part: body
        words:
          - "NameError"
        negative: true
        internal: true

  - raw:
      - |
        POST /security/user/authenticate/run_as HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json
        Authorization: Basic {{base64(username + ':' + password)}}

        {{payload}}

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "NameError"

      - type: status
        status:
          - 500

CVE-2025-24016.yaml on GitHub

Suricata rules (network detection)

1 rule that alert on traffic matching this exploit: VEDAS CVE-2025-24016 Wazuh - Insecure Deserialization. Add them to your Suricata rule set and reload.

Show the rules
suricata
alert http $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"VEDAS CVE-2025-24016 Wazuh - Insecure Deserialization"; flow:established,to_server; http.uri; content:"/security/user/authenticate/run_as"; nocase; fast_pattern; classtype:web-application-attack; reference:cve,CVE-2025-24016; reference:url,https://www.exploit.observer/?keyword=CVE-2025-24016&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=wazuh&match=exact; sid:1011485; rev:1;)

CVE-2025-24016.rules on GitHub

References

Government sources

Other references

Other databases

Where this comes from

This advisory is generated automatically by VEDAS from: CVE.org record, CISA KEV, cve-scores (EPSS and VEDAS), Exploit Observer, vedas-signatures. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.