CVE-2023-45663

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.5 under NVD CVSS v3. EPSS exploit probability: 0.7%, top 52% 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
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 5.5Exploit: NoneExposed: 0

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

stb_image is a single file MIT licensed library for processing images. The stbi__getn function reads a specified number of bytes from context (typically a file) into the specified buffer. In case the file stream points to the end, it returns zero. There are two places where its return value is not checked: In the stbi__hdr_load function and in the stbi__tga_load function. The latter of the two is likely more exploitable as an attacker may also control the size of an uninitialized buffer.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
56(Attend)
EG Risk 56/100SSVC: Attend

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
Severity55% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS
47.7%
KEV
Not listed

Published

October 21, 2023

Last Modified

June 17, 2026

References (14)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 51× 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 110 total refreshes for this CVE.

  1. 2026-07-23 14:16 UTCEPSS rescore
  2. 2026-07-23 02:27 UTCEG score recompute
  3. 2026-07-22 23:13 UTCEG score recompute▲ 0.20
  4. 2026-07-22 14:06 UTCEPSS rescore
  5. 2026-07-21 15:23 UTCEPSS rescore
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  13. 2026-07-16 17:01 UTCEPSS rescore
  14. 2026-07-15 16:56 UTCEPSS rescore
  15. 2026-07-15 16:56 UTCEPSS rescore
  16. 2026-07-15 06:19 UTCOSV refresh
  17. 2026-07-15 01:59 UTCEPSS rescore
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  1. 2026-07-08 15:13 UTCEPSS rescore
  2. 2026-07-07 13:44 UTCEPSS rescore
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  4. 2026-07-06 16:26 UTCEPSS rescore
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  6. 2026-07-06 02:22 UTCEPSS rescore
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  17. 2026-06-28 04:55 UTCEPSS rescore
  18. 2026-06-27 06:34 UTCOSV refresh
  19. 2026-06-27 03:07 UTCEPSS rescore
  20. 2026-06-25 13:48 UTCEPSS rescore
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  22. 2026-06-24 14:04 UTCEPSS rescore
  23. 2026-06-24 14:04 UTCEPSS rescore
  24. 2026-06-24 06:25 UTCNVD updateCVSS v3 → 5.5
  25. 2026-06-23 21:31 UTCEPSS rescore
  26. 2026-06-23 21:31 UTCEPSS rescore
  27. 2026-06-22 14:24 UTCEPSS rescore
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  35. 2026-06-18 17:51 UTCEPSS rescore
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  40. 2026-06-15 17:47 UTCEPSS rescore
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  42. 2026-06-14 23:16 UTCEPSS rescore
  43. 2026-06-13 22:59 UTCEPSS rescore
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  45. 2026-06-12 23:10 UTCEPSS rescore
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  47. 2026-06-11 13:59 UTCEPSS rescore
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  49. 2026-06-10 22:17 UTCEPSS rescore
  50. 2026-06-10 13:21 UTCEPSS rescore
  51. 2026-06-10 13:21 UTCEPSS rescore
  52. 2026-06-09 17:17 UTCOSV refresh
  53. 2026-06-08 14:16 UTCEPSS rescore
  54. 2026-06-08 14:16 UTCEPSS rescore
  55. 2026-06-07 15:23 UTCEPSS rescore
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  70. 2026-05-31 22:30 UTCEPSS rescore
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  72. 2026-05-31 00:15 UTCEPSS rescore
  73. 2026-05-31 00:15 UTCEPSS rescore
  74. 2026-05-29 13:43 UTCEPSS rescore
  75. 2026-05-29 13:43 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2023-45663?
CVE-2023-45663 is a medium vulnerability published on October 21, 2023. stbimage is a single file MIT licensed library for processing images. The stbigetn function reads a specified number of bytes from context (typically a file) into the specified buffer. In case the file stream points to the end, it returns zero. There are two places where its return value is not…
When was CVE-2023-45663 disclosed?
CVE-2023-45663 was first published in the National Vulnerability Database on October 21, 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-2023-45663 actively exploited?
CVE-2023-45663 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 47.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-45663?
CVE-2023-45663 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2023-45663?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-45663, 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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