How severe is CVE-2023-27390?

CVE-2023-27390 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-27390 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-27390?

CVE-2023-27390 affects Diagon Project Diagon. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-27390?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-27390 published?

CVE-2023-27390 was published on 2023-07-05 and last updated on 2026-06-17.

CVE-2023-27390

CVE-2023-27390 is a high-severity vulnerability in Diagon Project Diagon with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-122.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-122
Affected product: Diagon Project Diagon
Published: 2023-07-05
Last modified: 2026-06-17

Description

A heap-based buffer overflow vulnerability exists in the Sequence::DrawText functionality of Diagon v1.0.139. A specially crafted markdown file can lead to arbitrary code execution. A victim would need to open a malicious file to trigger this vulnerability.

Frequently asked questions

What is CVE-2023-27390?: A heap-based buffer overflow vulnerability exists in the Sequence::DrawText functionality of Diagon v1.0.139. A specially crafted markdown file can lead to arbitrary code execution. A victim would need to open a malicious file to trigger this vulnerability.
How severe is CVE-2023-27390?: CVE-2023-27390 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-27390 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-27390?: CVE-2023-27390 affects Diagon Project Diagon. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-27390?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-27390 published?: CVE-2023-27390 was published on 2023-07-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:diagon_project:diagon:1.0.139:*:*:*:*:*:*:*

More vulnerabilities in Diagon Project Diagon

CVE-2023-31194 — Medium (CVSS 5.3): An improper array index validation vulnerability exists in the GraphPlanar::Write functionality of Diagon v1.0.139. A…

All CVEs affecting Diagon Project Diagon →

Other CWE-122 (Heap-based Buffer Overflow) vulnerabilities

CVE-2026-46752 — Critical (CVSS 10.0): Redis Lua HEAP overflow in cjson library vulnerability in Apache Kvrocks. This issue affects Apache Kvrocks: from…
CVE-2026-24822 — Critical (CVSS 10.0): Out-of-bounds Write, Heap-based Buffer Overflow vulnerability in ttttupup wxhelper (src modules). This vulnerability is…
CVE-2025-23123 — Critical (CVSS 10.0): A malicious actor with access to the management network could execute a remote code execution (RCE) by exploiting a…
CVE-2022-34819 — Critical (CVSS 10.0): A vulnerability has been identified in SIMATIC CP 1242-7 V2 (All versions < V3.3.46), SIMATIC CP 1243-1 (All versions <…
CVE-2026-44050 — Critical (CVSS 9.9): A heap-based buffer overflow in the CNID daemon comm_rcv() function in Netatalk 2.0.0 through 4.4.2 allows a remote…
CVE-2026-49841 — Critical (CVSS 9.8): FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to…

Browse all CWE-122 (Heap-based Buffer Overflow) vulnerabilities →