CVE-2021-33493Public exploit

Java code execution via unsafe YAML parsing

Published Nov 22, 2021 · Updated Aug 3, 2024

Code injection in OX App Suite 7.10.5 and earlier allows local users with high privileges to execute Java code through configuration files. The middleware's YAML parser uses an insecure parsing method that instantiates and executes arbitrary YAML-formatted Java classes. Exploitation requires high-privilege access to modify a configuration file and a subsequent reload or restart; code runs in the middleware process context.

CVSS severity3.9
Low
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in OX App Suite 7.10.5 and earlier allows local users with high privileges to execute Java code through configuration files. The middleware's YAML parser uses an insecure parsing method that instantiates and executes arbitrary YAML-formatted Java classes. Exploitation requires high-privilege access to modify a configuration file and a subsequent reload or restart; code runs in the middleware process context.

The record

CVE
CVE-2021-33493
Published
Nov 22, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-94
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Nov 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.0NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
3.6NVDAV:L/AC:L/Au:N/C:N/I:P/A:P
3.9OX Software GmbHCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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