THREATPORT/VULNERABILITY/CVE-2023-23924
CRITICAL SEVERITY

CVE-2023-23924

Dompdf vulnerability

CVSS
10.0
EPSS
3.6%
EPSS pct
88th
Exploited
No known
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.
Affected vendor
Dompdf Project
Affected product
Dompdf
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:H
Weakness type (CWE)
Published
2023-02-01

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, low impact to integrity, high impact to availability.

Its EPSS score of 3.6% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 88% of all scored CVEs.

Check your external exposure to CVE-2023-23924

  • Confirm whether Dompdf Project Dompdf is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2023-23924.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2023-23924

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2023-23924 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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