Buffer overflow in Notepad-Plus-Plus Notepad\+\+
CVE-2023-40031
Notepad++ is a free and open-source source code editor. Versions 8.5.6 and prior are vulnerable to heap buffer write overflow in `Utf8_16_Read::convert`. This issue may lead to arbitrary code execution. As of time of publication, no known patches are available in existing versions of Notepad++.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (41.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Notepad-Plus-Plus Notepad\+\+
- Notepad-Plus-Plus — versions <= 8.5.6
Weakness classification (CWE)
Public proof-of-concept exploits
References
- securitylab.github.com/advisories/GHSL-2023-092_Notepad__/ (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-40031?
- CVE-2023-40031 is a high-severity vulnerability in Notepad-Plus-Plus Notepad\+\+, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.8/10. Published 2023-08-25.
- How severe is CVE-2023-40031?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2023-40031 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.