CVE-2024-52596Network attack vector

Unauthenticated file disclosure via external entity loading

Published Dec 2, 2024 · Updated Dec 2, 2024

XXE in SimpleSAMLphp xml-common before 1.20.0 allows remote attackers to read local files or access internal network resources. DOMDocumentFactory::fromString loads attacker-controlled XML with LIBXML_DTDLOAD and LIBXML_DTDATTR before checking for a DOCTYPE, while LIBXML_NONET can be bypassed with PHP stream filters. Unauthenticated reachability depends on a consuming application passing untrusted XML, such as a SAMLResponse; successful exploitation discloses files or induces server-side requests.

CVSS severity8.8
High
EPSS probability0.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XXE in SimpleSAMLphp xml-common before 1.20.0 allows remote attackers to read local files or access internal network resources. DOMDocumentFactory::fromString loads attacker-controlled XML with LIBXML_DTDLOAD and LIBXML_DTDATTR before checking for a DOCTYPE, while LIBXML_NONET can be bypassed with PHP stream filters. Unauthenticated reachability depends on a consuming application passing untrusted XML, such as a SAMLResponse; successful exploitation discloses files or induces server-side requests.

The record

CVE
CVE-2024-52596
Published
Dec 2, 2024
Updated
Dec 2, 2024
Vendor
SimpleSAMLphp
Product
xml-common
Classifications
CWE-611, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 2, 2024CVE publishedPublication date reported by the CVE source.
  2. Dec 2, 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=0 <1.20.0
  2. Affected versionversion=< 1.20.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SimpleSAMLphp · xml-commonversion=0 <1.20.0; version=< 1.20.0

Published CVSS scores

8.8GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:L/SI:L/SA: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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