CVE-2013-4333Network attack vector

File disclosure via external entity resolution

Published Jan 24, 2020 · Updated Aug 6, 2024

XML external entity injection in OpenPNE 3 3.0.8.5, 3.2.7.6, 3.4.21.1, 3.6.11, and 3.8.7 allows remote attackers to read server files. Plugin setup and bundled opAuthOpenIDPlugin parsing accept attacker-controlled XML while external entity resolution remains enabled. No authentication is required; exposure is limited to sites using libxml2 before 2.9.0, where crafted XML can disclose server data or exhaust resources.

CVSS severity9.1
Critical
EPSS probability2.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XML external entity injection in OpenPNE 3 3.0.8.5, 3.2.7.6, 3.4.21.1, 3.6.11, and 3.8.7 allows remote attackers to read server files. Plugin setup and bundled opAuthOpenIDPlugin parsing accept attacker-controlled XML while external entity resolution remains enabled. No authentication is required; exposure is limited to sites using libxml2 before 2.9.0, where crafted XML can disclose server data or exhaust resources.

The record

CVE
CVE-2013-4333
Published
Jan 24, 2020
Updated
Aug 6, 2024
Vendor
OpenPNE Project
Product
OpenPNE
Classifications
CWE-611, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 24, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 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=3.0.8.5 (Fixed: 3.8.7.1
  2. Affected versionversion=3.0.8.6)
  3. Affected versionversion=3.2.7.6
  4. Affected versionversion=3.2.7.7
  5. Affected versionversion=3.4.21.1
  6. Affected versionversion=3.4.21.2
  7. Affected versionversion=3.6.11
  8. Affected versionversion=3.6.11.1
  9. Affected versionversion=3.8.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenPNE Project · OpenPNEversion=3.0.8.5 (Fixed: 3.8.7.1; version=3.0.8.6); version=3.2.7.6; version=3.2.7.7; version=3.4.21.1; version=3.4.21.2; version=3.6.11; version=3.6.11.1; version=3.8.7

Published CVSS scores

9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
6.4NIST NVDAV:N/AC:L/Au:N/C:P/I:N/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.

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

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference
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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