CVE-2023-39469
PaperCut NG External User Lookup Code Injection Remote Code Execution Vulnerability.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 61.4%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
Description
PaperCut NG External User Lookup Code Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of PaperCut NG. Authentication is required to exploit this vulnerability. The specific flaw exists within the External User Lookup functionality. The issue results from the lack of proper validation of a user-supplied string before using it to execute Java code. An attacker can leverage this vulnerability to execute code in the context of SYSTEM. Was ZDI-CAN-21013.
- CVSS 3.1
- 7.2 HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 61.37% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-94
- Affected
- papercut/papercut mf · papercut/papercut ng
- Source
- zdi-disclosures@trendmicro.com
EPSS 61.4% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://www.papercut.com/kb/Main/SecurityBulletinJuly2023/Vendor Advisory, Related
- https://www.zerodayinitiative.com/advisories/ZDI-23-1285/Third Party Advisory
- https://www.papercut.com/kb/Main/SecurityBulletinJuly2023/Vendor Advisory, Related
- https://www.zerodayinitiative.com/advisories/ZDI-23-1285/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.