Cyber Resilience

CVE-2023-34366

HighPublic PoC

Published: 19 October 2023

Published
19 October 2023
Modified
04 November 2025
KEV Added
Patch
CVSS Score v3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score 0.0018 39.1th percentile
Risk Priority 16 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2023-34366 is a high-severity Use After Free (CWE-416) vulnerability in Justsystems Easy Postcard Max. Its CVSS base score is 7.8 (High).

Operationally, ranked at the 39.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

A use-after-free vulnerability exists in the Figure stream parsing functionality of Ichitaro 2023 1.0.1.59372. A specially crafted document can cause memory corruption, resulting in arbitrary code execution. Victim would need to open a malicious file to trigger this vulnerability.

CWE(s)

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

justsystems
easy postcard max
all versions
justsystems
ichitaro 2021
all versions
justsystems
ichitaro 2022
all versions
justsystems
ichitaro 2023
1.0.1.59372
justsystems
ichitaro government 10
all versions
justsystems
ichitaro government 8
all versions
justsystems
ichitaro government 9
all versions
justsystems
ichitaro pro 3
all versions
justsystems
ichitaro pro 4
all versions
justsystems
ichitaro pro 5
all versions
+9 more product configuration(s) — see NVD for full list

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

addresses: CWE-416

Use-after-free exploits that achieve arbitrary code execution are blocked or significantly hardened by non-executable pages and ASLR.

References