HOMEVULNERABILITIESCVE-2023-23924
CRITICAL

CVE-2023-23924

CWE-551Published: February 1, 2023· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2023-23924 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

dompdf_project1 product(s)
dompdf
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/dompdf/dompdf/commit/7558f07f693b2ac3266089f21051e6b78c6a0c85
PATCHhttps://github.com/dompdf/dompdf/commit/7558f07f693b2ac3266089f21051e6b78c6a0c85
ADVISORYhttps://github.com/dompdf/dompdf/releases/tag/v2.0.2
ADVISORYhttps://github.com/dompdf/dompdf/security/advisories/GHSA-3cw5-7cxw-v5qg
ADVISORYhttps://github.com/dompdf/dompdf/releases/tag/v2.0.2
ADVISORYhttps://github.com/dompdf/dompdf/security/advisories/GHSA-3cw5-7cxw-v5qg

All References (6)

→
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

Quick Facts

CVE IDCVE-2023-23924
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-551
CISA KEVNo
Affected1 vendor(s)
PublishedFeb 1, 2023

Related CVEs (CWE-551)

CVE-2016-20030
9.8
CVE-2021-32777
8.3
CVE-2021-32779
8.3
CVE-2026-4636
8.1
CVE-2026-57920
7.7

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-23924 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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