CVE-2023-50252PHP-Svg-Lib Insecure Deserialization
Prior to version 0.5.1, when handling tag that references an tag, it merges the attributes from the tag to the tag.
Published Dec 12, 2023 · Updated Aug 12, 2026 · Also known as DEBIAN-CVE-2023-50252, GHSA-jq98-9543-m4cr
Key Facts
Patch in the next maintenance window- CVE-2023-50252 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting PHP-Svg-Lib (Dompdf), php-dompdf-svg-lib (debian).
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 24% probability of exploitation in the next 30 days.
- Fixed versions are available, including PHP-Svg-Lib 0.5.1, php-dompdf-svg-lib 0.5.0-3+deb12u1, php-dompdf-svg-lib 0.5.1-1.
- Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.
Scores
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
24%
Higher than 97.8% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
41/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
Description
php-svg-lib is an SVG file parsing / rendering library. Prior to version 0.5.1, when handling tag that references an tag, it merges the attributes from the tag to the tag. The problem pops up especially when the href attribute from the tag has not been sanitized. This can lead to an unsafe file read that can cause PHAR Deserialization vulnerability in PHP prior to version 8. Version 0.5.1 contains a patch for this issue.
Affected Products
7 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| PHP-Svg-LibDompdf | >= < 0.5.1 | 0.5.1 |
| php-dompdf-svg-libdebian | See advisory | 0.5.0-3+deb12u1 |
Patched Releases
PHP-Svg-Lib
0.5.1
php-dompdf-svg-lib
0.5.0-3+deb12u1, 0.5.1-1
Timeline
Publicly disclosed
Dec 12, 2023
Last updated
Aug 12, 2026
Weakness Type
- CWE-15 External Control of System or Configuration Setting
- CWE-502 Deserialization of Untrusted Data
References
FAQ
Common Questions.
php-svg-lib is an SVG file parsing / rendering library.
Affected: PHP-Svg-Lib (Dompdf) versions >= < 0.5.1; php-dompdf-svg-lib (debian). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including PHP-Svg-Lib 0.5.1, php-dompdf-svg-lib 0.5.0-3+deb12u1, php-dompdf-svg-lib 0.5.1-1.
Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.
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