CVE-2023-50252

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 23.9%, top 2% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 24%CVSS: 9.8Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
65(Track*)
EG Risk 65/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation40% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
24%
EPSS %ILE
98%
KEV
Not listed

Published

December 12, 2023

Last Modified

June 17, 2026

Advisory Details (2)

Auto-updated Sep 7, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
github Patch Available🟡 PoC Available

Unsafe attributes merge when parsing `use` tag · Advisory · dompdf/php-svg-lib · GitHub

https://github.com/dompdf/php-svg-lib/security/advisories/GHSA-jq98-9543-m4cr
github_commit Patch Available

commit 08ce6a96d63a (dompdf/php-svg-lib)

Patch available: dompdf/php-svg-lib 0.5.1 (contains commit 08ce6a96d63a)

https://github.com/dompdf/php-svg-lib/commit/08ce6a96d63ad7216315fae34a61c886dd2dc030

Affected Packages

(1 across 1 ecosystem)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
php-dompdf-svg-lib0.5.0-30.5.0-3+deb12u1—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 32× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 144 total refreshes for this CVE.

  1. 2026-09-07 15:59 UTCEPSS rescore
  2. 2026-09-06 13:46 UTCEPSS rescore
  3. 2026-09-06 13:45 UTCEPSS rescore
  4. 2026-09-05 15:26 UTCEPSS rescore
  5. 2026-09-04 13:58 UTCEPSS rescore
  6. 2026-09-04 05:04 UTCEPSS rescore
  7. 2026-09-03 11:00 UTCOSV refresh
  8. 2026-09-02 14:10 UTCEPSS rescore
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  10. 2026-09-01 13:51 UTCEPSS rescore
  11. 2026-09-01 04:35 UTCEPSS rescore
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  20. 2026-08-21 23:47 UTCEPSS rescore
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  22. 2026-08-19 17:02 UTCEPSS rescore
  23. 2026-08-19 17:02 UTCEPSS rescore
  24. 2026-08-18 13:46 UTCEPSS rescore
  25. 2026-08-17 00:21 UTCOSV refresh
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  1. 2026-08-16 14:54 UTCEPSS rescore
  2. 2026-08-16 02:12 UTCEPSS rescore
  3. 2026-08-15 01:28 UTCEPSS rescore
  4. 2026-08-13 21:58 UTCEPSS rescore
  5. 2026-08-12 13:49 UTCEPSS rescore
  6. 2026-08-11 13:40 UTCEPSS rescore
  7. 2026-08-10 23:57 UTCEPSS rescore
  8. 2026-08-08 16:35 UTCEPSS rescore
  9. 2026-08-07 16:25 UTCEPSS rescore
  10. 2026-08-06 13:45 UTCEPSS rescore
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  13. 2026-08-03 10:34 UTCEPSS rescore
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  15. 2026-08-02 02:25 UTCEPSS rescore
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  17. 2026-08-01 18:36 UTCOSV refresh
  18. 2026-08-01 04:14 UTCEPSS rescore
  19. 2026-07-30 16:26 UTCEPSS rescore
  20. 2026-07-30 16:26 UTCEPSS rescore
  21. 2026-07-30 01:28 UTCEPSS rescore
  22. 2026-07-28 15:34 UTCEPSS rescore
  23. 2026-07-28 15:34 UTCEPSS rescore
  24. 2026-07-27 14:10 UTCEPSS rescore
  25. 2026-07-26 14:52 UTCEPSS rescore
  26. 2026-07-25 14:16 UTCEPSS rescore
  27. 2026-07-24 14:16 UTCEPSS rescore
  28. 2026-07-24 14:16 UTCEPSS rescore
  29. 2026-07-23 14:16 UTCEPSS rescore
  30. 2026-07-23 02:28 UTCEG score recompute
  31. 2026-07-22 23:15 UTCEG score recompute▲ 1.50
  32. 2026-07-22 14:06 UTCEPSS rescore
  33. 2026-07-21 15:23 UTCEPSS rescore
  34. 2026-07-21 15:23 UTCEPSS rescore
  35. 2026-07-20 17:06 UTCEPSS rescore
  36. 2026-07-19 14:29 UTCEPSS rescore
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  38. 2026-07-18 10:03 UTCEPSS rescore
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  40. 2026-07-16 17:01 UTCEPSS rescore
  41. 2026-07-15 16:56 UTCEPSS rescore
  42. 2026-07-15 16:56 UTCEPSS rescore
  43. 2026-07-15 01:40 UTCOSV refresh
  44. 2026-07-13 22:28 UTCEPSS rescore
  45. 2026-07-13 22:28 UTCEPSS rescore
  46. 2026-07-13 06:11 UTCEPSS rescore
  47. 2026-07-13 06:11 UTCEPSS rescore
  48. 2026-07-12 05:45 UTCEPSS rescore
  49. 2026-07-11 08:26 UTCEPSS rescore
  50. 2026-07-09 19:08 UTCEPSS rescore
  51. 2026-07-07 13:44 UTCEPSS rescore
  52. 2026-07-07 13:44 UTCEPSS rescore
  53. 2026-07-06 16:26 UTCEPSS rescore
  54. 2026-07-06 16:26 UTCEPSS rescore
  55. 2026-07-06 02:22 UTCEPSS rescore
  56. 2026-07-05 02:29 UTCEPSS rescore
  57. 2026-07-04 06:29 UTCEPSS rescore
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  59. 2026-07-02 16:59 UTCEPSS rescore
  60. 2026-07-01 15:05 UTCEPSS rescore
  61. 2026-06-30 23:21 UTCEPSS rescore
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  63. 2026-06-28 04:55 UTCEPSS rescore
  64. 2026-06-27 03:07 UTCEPSS rescore
  65. 2026-06-27 02:37 UTCOSV refresh
  66. 2026-06-25 13:48 UTCEPSS rescore
  67. 2026-06-25 13:48 UTCEPSS rescore
  68. 2026-06-24 14:04 UTCEPSS rescore
  69. 2026-06-24 14:04 UTCEPSS rescore
  70. 2026-06-24 06:34 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  71. 2026-06-23 21:31 UTCEPSS rescore
  72. 2026-06-23 21:31 UTCEPSS rescore
  73. 2026-06-22 14:24 UTCEPSS rescore
  74. 2026-06-22 14:24 UTCEPSS rescore
  75. 2026-06-21 14:55 UTCEPSS rescore

Frequently asked(5)

What is CVE-2023-50252?
CVE-2023-50252 is a critical vulnerability published on December 12, 2023. php-svg-lib is an SVG file parsing / rendering library. Prior to version 0.5.1, when handling <use> tag that references an <image> tag, it merges the attributes from the <use> tag to the <image> tag. The problem pops up especially when the href attribute from the <use> tag has not been sanitized.…
When was CVE-2023-50252 disclosed?
CVE-2023-50252 was first published in the National Vulnerability Database on December 12, 2023, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-50252 actively exploited?
CVE-2023-50252 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 24% probability of exploitation in the next 30 days, which ranks it in the top 2.3% of all scored CVEs.
What is the CVSS score of CVE-2023-50252?
CVE-2023-50252 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2023-50252?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-50252, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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