CVE-2023-21930Network attack vector

Data disclosure and modification via undisclosed JSSE flaw

Published Apr 18, 2023 · Updated Feb 13, 2025

An unspecified JSSE flaw in Oracle Java SE and GraalVM Enterprise Edition allows remote attackers to read and modify data over TLS. Oracle identifies JSSE as the affected component but has not disclosed the faulty operation or how TLS input triggers it. Exploitation requires network access to an affected JSSE API such as a web service, or a sandboxed client that loads untrusted code.

CVSS severity7.4
High
EPSS probability1.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An unspecified JSSE flaw in Oracle Java SE and GraalVM Enterprise Edition allows remote attackers to read and modify data over TLS. Oracle identifies JSSE as the affected component but has not disclosed the faulty operation or how TLS input triggers it. Exploitation requires network access to an affected JSSE API such as a web service, or a sandboxed client that loads untrusted code.

The record

CVE
CVE-2023-21930
Published
Apr 18, 2023
Updated
Feb 13, 2025
Vendor
Debian
Product
Debian GNU/Linux
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 18, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0
  2. Affected versionversion=11.0
  3. Affected versionversion=12.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Debian · Debian GNU/Linuxversion=10.0; version=11.0; version=12.0
Oracle · Java Development Kit (JDK)version=11.0.18; version=17.0.6; version=1.8.0; version=20
Oracle · Java Runtime Environment (JRE)version=11.0.18; version=17.0.6; version=1.8.0; version=20
NetApp · OnCommand Insightversion=0 <*
Oracle · Oracle GraalVM for JDKversion=21.3.5; version=22.3.1
Oracle Corporation · Java Platform, Standard Edition (Java SE)version=Oracle GraalVM Enterprise Edition:20.3.9; version=Oracle GraalVM Enterprise Edition:21.3.5; version=Oracle GraalVM Enterprise Edition:22.3.1; version=Oracle Java SE:11.0.18; version=Oracle Java SE:17.0.6; version=Oracle Java SE:20; version=Oracle Java SE:8u361; version=Oracle Java SE:8u361-perf

Published CVSS scores

7.4OracleCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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