OpenKM Community Edition: Improper Control of Generation of Code
CVE-2026-42785 is a high-severity improper control of generation of code vulnerability in OpenKM Community Edition from OpenKM, with a CVSS 3.1 base score of 7.2 out of 10. It can be exploited remotely over the network by an attacker with administrator privileges, without any action from a user. Affected OpenKM Community Edition versions: 6.3.12 and earlier. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.68% chance of exploitation within 30 days, higher than 53% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of OpenKM Community Edition you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Openkm | OpenKM Community Edition | 6.3.12 and earlier | Not stated |
| Openkm | OpenKM Professional Edition | 7.1.47 and earlier | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- HighAdministrator-level access is required first.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (vulncheck.com).
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 8.6 | High | CNA (vulncheck.com) |
| CVSS 3.1 | 7.2 | High | CNA (vulncheck.com) |
Official description
OpenKM 6.3.12 contains a remote code execution vulnerability that allows authenticated administrators to execute arbitrary Java/BeanShell code through the /admin/Scripting endpoint. Attackers can submit malicious script content with an action=Evaluate parameter to execute operating system commands in the context of the OpenKM application server.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Control of Generation of Code
The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
How developers prevent this class of flaw
- Refactor your program so that you do not have to dynamically generate code.
- Run your code in a jail or similar sandbox environment that enforces strict boundaries between the process and the operating system. This may effectively restrict which code can be executed by your product. Examples include the Unix chroot jail and AppArmor. In general, managed code may provide some protection. This may not be a feasible solution, and it only limits the impact to the operating system; the rest of your application may still be subject to compromise. Be careful to avoid CWE-243 and other weaknesses related to jails.
- Use dynamic tools and techniques that interact with the product using large test suites with many diverse inputs, such as fuzz testing (fuzzing), robustness testing, and fault injection. The product's operation may slow down, but it should not become unstable, crash, or generate incorrect results.
More Improper Control of Generation of Code vulnerabilities (CWE-94)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other references
- github.com/terrasystemlabs/Exploits/tree/main/OpenKM-Exploits
- github.com/terrasystemlabs/Exploits/tree/main/OpenKM-Exploits/nuclei-templates/openkm-remote-code-execution
- hub.docker.com/r/openkm/openkm-ce
- terrasystemlabs.com/post?slug=openkm-zero-day-vulnerabilities-terra-system-labs
- exploit-db.com/exploits/52520
- openkm.com/
- vulncheck.com/advisories/openkm-remote-code-execution-via-administrative-scripting
Other vulnerabilities in OpenKM Community Edition
- 8.7 High severity
- 8.3 High severity
- 7.2 High severity
Recent Improper Control of Generation of Code vulnerabilities
- 9.8 Critical severity
- 9.8 Critical severity
- 7.8 High severity
- 7.2 High severity
- 9.3 Critical severity
- 9.5 Critical severity
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