# CVE-2026-8753: Kalcaddle Kodbox command injection in fileThumb plugin

Source: https://junglewise.ai/threats/cve-2026-8753-kalcaddle-kodbox-command-injection-in-filethumb-plugin  
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-2026-8753 · Severity: medium · CVSS 6.3 · Published 2026-05-17

Kalcaddle Kodbox, a web-based document management and collaboration platform, contains a security flaw in its video thumbnail processing component. An attacker can exploit this to run unauthorized commands on the server hosting the application. This could lead to a full system compromise, data theft, or disruption of business operations. The vulnerability is currently public, and the vendor has not yet released a fix.

Technologies: [Kalcaddle Kodbox](https://junglewise.ai/threats/technologies/kodbox). Vendors: [Kalcaddle](https://junglewise.ai/threats/vendors/kalcaddle).

## Quick answers

**Is CVE-2026-8753 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-8753 being exploited in the wild.

**How severe is CVE-2026-8753?** Medium severity, with a CVSS score of 6.3, published 17 May 2026.

**Which products and versions are affected?** Kalcaddle Kodbox up to 1.64.

**Is there a fix for CVE-2026-8753?** 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-2026-8753 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-8753?** Check whether you run Kalcaddle Kodbox 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

A command injection vulnerability exists in Kalcaddle Kodbox versions up to 1.64 within the fileThumb plugin. The flaw is located in the parseVideoInfo function of the /workspace/source-code/plugins/fileThumb/lib/VideoResize.class.php file. The application fails to properly sanitize the 'ffmpegBin' argument before passing it to a system shell, allowing an authenticated remote attacker to execute arbitrary commands. While the attack requires low privileges (PR:L), the exploit has been publicly disclosed. As of the advisory date, the vendor has not responded to the disclosure, and no patch is currently available.

## Affected products

- kalcaddle Kodbox up to 1.64

## Timeline

- 2026-05-17: advisory: Vulnerability disclosed via VulDB and NVD
- 2026-05-17: disclosed: Public exploit code has been disclosed

## References

- [https://vuldb.com/submit/810109](https://vuldb.com/submit/810109)
- [https://vuldb.com/vuln/364380](https://vuldb.com/vuln/364380)
- [https://vuldb.com/vuln/364380/cti](https://vuldb.com/vuln/364380/cti)
- [https://vulnplus-note.wetolink.com/share/R0hHqwMywhsm](https://vulnplus-note.wetolink.com/share/R0hHqwMywhsm)

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