CVE-2023-24813Network attack vector

Arbitrary URL access via mismatched SVG attributes

Published Feb 7, 2023 · Updated Mar 10, 2025

Interpretation conflict in dompdf 2.0.2 allows remote attackers to invoke arbitrary-protocol URLs through crafted SVG input. In src/Image/Cache.php, validation prefers xlink:href, while php-svg-lib later overwrites it with href, so an empty xlink:href leaves a malicious href unchecked. Supplying an SVG is required; on PHP before 8.0.0, a phar URL triggers deserialization that can delete files and can execute code when suitable classes exist.

CVSS severity10.0
Critical
EPSS probability2.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Interpretation conflict in dompdf 2.0.2 allows remote attackers to invoke arbitrary-protocol URLs through crafted SVG input. In src/Image/Cache.php, validation prefers xlink:href, while php-svg-lib later overwrites it with href, so an empty xlink:href leaves a malicious href unchecked. Supplying an SVG is required; on PHP before 8.0.0, a phar URL triggers deserialization that can delete files and can execute code when suitable classes exist.

The record

CVE
CVE-2023-24813
Published
Feb 7, 2023
Updated
Mar 10, 2025
Vendor
dompdf
Product
dompdf
Classifications
CWE-436, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 10, 2025Record 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== 2.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

dompdf · dompdfversion== 2.0.2

Published CVSS scores

10.0GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

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-436Interpretation Conflict
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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