CVE-2021-2322Public exploitNetwork attack vector

Authenticated code execution via unsafe XML decoding

Published Jun 23, 2021 · Updated Sep 26, 2024

Unsafe XML deserialization in Oracle OpenGrok 1.6.7 and earlier allows remote authenticated users to execute code through HTTPS. The plugin configuration decoder passes XML to java.beans.XMLDecoder with the general application class loader, allowing attacker-selected classes and methods such as Runtime.exec or ProcessBuilder.start. Low-privileged access to the affected web application path is sufficient for command execution and complete OpenGrok takeover.

CVSS severity8.8
High
EPSS probability1.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe XML deserialization in Oracle OpenGrok 1.6.7 and earlier allows remote authenticated users to execute code through HTTPS. The plugin configuration decoder passes XML to java.beans.XMLDecoder with the general application class loader, allowing attacker-selected classes and methods such as Runtime.exec or ProcessBuilder.start. Low-privileged access to the affected web application path is sufficient for command execution and complete OpenGrok takeover.

The record

CVE
CVE-2021-2322
Published
Jun 23, 2021
Updated
Sep 26, 2024
Vendor
Oracle
Product
OpenGrok
Classifications
CWE-91, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 23, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 26, 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?

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

  1. Affected versionversion=1.6.7 and prior

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Oracle · OpenGrokversion=1.6.7 and prior

Published CVSS scores

8.8OracleCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-91XML Injection (aka Blind XPath Injection)
T1190Exploit Public-Facing Application

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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