# CVE-2026-8758: Metasoft MetaCRM unrestricted file upload in upload3.jsp

Source: https://junglewise.ai/threats/cve-2026-8758-metasoft-metacrm-unrestricted-file-upload-in-upload3-jsp  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-17. Updated: 2026-05-17  
License: CC BY 4.0 with a link back

CVE-2026-8758 · Severity: high · CVSS 7.3 · Published 2026-05-17

Metasoft MetaCRM, a customer relationship management platform, contains a security flaw that allows unauthorized users to upload files to the server. An attacker could use this to place malicious files on the system, potentially leading to a full compromise of the server and the customer data stored within it. This vulnerability can be exploited remotely without any user interaction or login credentials.

Technologies: [Metasoft MetaCRM](https://junglewise.ai/threats/technologies/metacrm). Vendors: [Metasoft](https://junglewise.ai/threats/vendors/metasoft).

## Quick answers

**Is CVE-2026-8758 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-8758 being exploited in the wild.

**How severe is CVE-2026-8758?** High severity, with a CVSS score of 7.3, published 17 May 2026.

**Which products and versions are affected?** Metasoft MetaCRM up to 6.4.0 Beta06.

**Is there a fix for CVE-2026-8758?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-8758 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-8758?** Check whether you run Metasoft MetaCRM at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An unrestricted file upload vulnerability (CWE-434) exists in Metasoft MetaCRM versions up to 6.4.0 Beta06. The flaw is located in the '/common/jsp/upload3.jsp' file and is triggered by manipulating the 'File' argument. Because the application fails to properly validate the type or content of uploaded files, a remote, unauthenticated attacker can upload arbitrary files to the web server. This typically allows for the execution of malicious scripts (such as a JSP web shell) in the context of the web server process. As of the advisory date, the vendor has not responded to disclosure attempts, and no official patch is available.

## Affected products

- Metasoft (美特软件) MetaCRM up to 6.4.0 Beta06

## Timeline

- 2026-05-17: advisory: Vulnerability disclosed via VulDB and NVD
- 2026-05-17: disclosed: Public disclosure of the exploit details

## References

- [https://ucn9h68n9289.feishu.cn/wiki/XmoNwpJjJiQrBtkLMitccF56ntb](https://ucn9h68n9289.feishu.cn/wiki/XmoNwpJjJiQrBtkLMitccF56ntb)
- [https://vuldb.com/submit/811283](https://vuldb.com/submit/811283)
- [https://vuldb.com/vuln/364385](https://vuldb.com/vuln/364385)
- [https://vuldb.com/vuln/364385/cti](https://vuldb.com/vuln/364385/cti)

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