CVE-2023-31826Public exploit

Local command execution via Hessian deserialization

Published May 23, 2023 · Updated Jan 17, 2025

Unsafe deserialization in Skyscreamer Nevado JMS 1.3.2 allows local users to execute arbitrary commands through crafted queue messages. The deserializeFromString method Base64-decodes received content and passes it to Hessian2Input for object deserialization with no intervening security check. Exploitation requires a non-transacted consumer session whose acknowledgment mode is not CLIENT_ACKNOWLEDGE, and commands run with the consuming process's privileges.

CVSS severity7.8
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe deserialization in Skyscreamer Nevado JMS 1.3.2 allows local users to execute arbitrary commands through crafted queue messages. The deserializeFromString method Base64-decodes received content and passes it to Hessian2Input for object deserialization with no intervening security check. Exploitation requires a non-transacted consumer session whose acknowledgment mode is not CLIENT_ACKNOWLEDGE, and commands run with the consuming process's privileges.

The record

CVE
CVE-2023-31826
Published
May 23, 2023
Updated
Jan 17, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-862, T1203
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 17, 2025Record 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
T1203Exploitation for Client Execution

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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