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How the CVE Works
CVE-2025-30691 is a vulnerability in Oracle Java SE’s compiler component, affecting versions 21.0.6 and 24, including Oracle GraalVM for JDK. The flaw arises due to improper validation during compilation, allowing an unauthenticated attacker to exploit it via network protocols. By crafting malicious input (e.g., through APIs or web services), an attacker can manipulate the compiler to perform unauthorized data modifications (insert, update, delete) or read restricted data. The attack complexity is high, requiring specific conditions, such as sandboxed Java Web Start or applets running untrusted code. The CVSS 3.1 score is 4.8 (AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N), indicating limited confidentiality and integrity impacts.
DailyCVE Form
Platform: Oracle Java SE
Version: 21.0.6, 24
Vulnerability: Compiler flaw
Severity: Medium
Date: 06/23/2025
Prediction: Patch by Q3 2025
What Undercode Say
Check Java version java -version Verify compiler logs grep -r "CompilerException" /var/log/java Sandbox escape test jjs -scripting exploit.js
How Exploit
- Craft malicious API calls to trigger compilation errors.
- Abuse Java Web Start to bypass sandbox via untrusted code.
- Chain with deserialization flaws for RCE.
Protection from this CVE
- Disable Java Web Start.
- Apply Oracle’s upcoming patch.
- Restrict untrusted code execution.
Impact
- Unauthorized data access.
- Partial integrity compromise.
- Limited sandbox escape risk.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
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