CVE-2012-1102Network attack vector

Protected resource disclosure via external entity expansion

Published Jul 9, 2021 · Updated Aug 6, 2024

XXE in XML::Atom before 0.39 allows remote attackers to read protected resources through XML from untrusted sources. The XML::LibXML and XML::Parser paths accepted external entity declarations and resolved their referenced local or network resources while parsing. Exposure requires a consuming application to pass attacker-controlled XML to the library; successful entity resolution discloses data readable by that process.

CVSS severity7.5
High
EPSS probability1.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XXE in XML::Atom before 0.39 allows remote attackers to read protected resources through XML from untrusted sources. The XML::LibXML and XML::Parser paths accepted external entity declarations and resolved their referenced local or network resources while parsing. Exposure requires a consuming application to pass attacker-controlled XML to the library; successful entity resolution discloses data readable by that process.

The record

CVE
CVE-2012-1102
Published
Jul 9, 2021
Updated
Aug 6, 2024
Vendor
Six Apart Ltd.
Product
XML::Atom
Classifications
CWE-611, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 9, 2021CVE 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?

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  1. Affected versionversion=perl-xml-atom 0.39

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Six Apart Ltd. · XML::Atomversion=perl-xml-atom 0.39

Published CVSS scores

5.0NIST National Vulnerability DatabaseAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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.

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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

CWE-611Improper Restriction of XML External Entity Reference
T1005Data from Local System

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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