CVE-2023-23924

Name: CVE-2023-23924
Creator: NVD / NIST
Published: 2023-02-01T00:15:10.693+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 3.57%

Last modified Jun 17, 2026

CVE-2023-23924 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Dompdf is an HTML to PDF converter. The URI validation on dompdf 2.0.1 can be bypassed on SVG parsing by passing `<image>` tags with uppercase letters. EPSS estimates a 3.57% chance of exploitation in the next 30 days.

Description

Dompdf is an HTML to PDF converter. The URI validation on dompdf 2.0.1 can be bypassed on SVG parsing by passing `<image>` tags with uppercase letters. This may lead to arbitrary object unserialize on PHP < 8, through the `phar` URL wrapper. An attacker can exploit the vulnerability to call arbitrary URL with arbitrary protocols, if they can provide a SVG file to dompdf. In PHP versions before 8.0.0, it leads to arbitrary unserialize, that will lead to the very least to an arbitrary file deletion and even remote code execution, depending on classes that are available.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

3.57%

87.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Dompdf Project	Dompdf	2.0.1

References

https://github.com/dompdf/dompdf/commit/7558f07f693b2ac3266089f21051e6b78c6a0c85Patch, Third Party Advisory
https://github.com/dompdf/dompdf/releases/tag/v2.0.2Release Notes, Third Party Advisory
https://github.com/dompdf/dompdf/security/advisories/GHSA-3cw5-7cxw-v5qgExploit, Third Party Advisory
https://github.com/dompdf/dompdf/commit/7558f07f693b2ac3266089f21051e6b78c6a0c85Patch, Third Party Advisory
https://github.com/dompdf/dompdf/releases/tag/v2.0.2Release Notes, Third Party Advisory
https://github.com/dompdf/dompdf/security/advisories/GHSA-3cw5-7cxw-v5qgExploit, Third Party Advisory

Timeline

Published: Feb 1, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-23924?

How severe is CVE-2023-23924?

CVE-2023-23924 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 3.57% probability of exploitation in the next 30 days.

How do I fix CVE-2023-23924?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-23924?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST