CVE-2024-34581Network attack vector

Server-side requests via unrestricted RetrievalMethod URI dereferencing

Published Jun 26, 2024 · Updated Aug 2, 2024

SSRF in W3C XML Signature Syntax and Processing 1.0 allows attackers to reach internal resources through crafted XML signatures. The RetrievalMethod element permits a KeyInfo URI, and implementations that blindly dereference an attacker-controlled external URI issue requests from the verifier. Exposure requires processing untrusted XML signatures without restricting external references; resulting access is bounded by the verifier's network and URI-handler permissions.

CVSS severity7.3
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in W3C XML Signature Syntax and Processing 1.0 allows attackers to reach internal resources through crafted XML signatures. The RetrievalMethod element permits a KeyInfo URI, and implementations that blindly dereference an attacker-controlled external URI issue requests from the verifier. Exposure requires processing untrusted XML signatures without restricting external references; resulting access is bounded by the verifier's network and URI-handler permissions.

The record

CVE
CVE-2024-34581
Published
Jun 26, 2024
Updated
Aug 2, 2024
Vendor
World Wide Web Consortium (W3C)
Product
XML Signature Syntax and Processing
Classifications
CWE-918
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 26, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 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 <1.1
  2. Affected versionversion=0 <2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

World Wide Web Consortium (W3C) · XML Signature Syntax and Processingversion=0 <1.1; version=0 <2.0

Published CVSS scores

7.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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-918Server-Side Request Forgery (SSRF)

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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