CVE-2026-100880 zhistaredu StarTraining Upload Endpoint MimeTypeUtils.java cross site scripting
Remote attackers can execute arbitrary scripts via the upload endpoint in StarTraining, potentially compromising user sessions and data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-100880?
CVE-2026-100880 is a medium-severity cross-site scripting vulnerability in zhistaredu StarTraining, published on 27 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A weakness has been identified in zhistaredu StarTraining up to 3.8.1. This vulnerability affects unknown code of the file du-common/src/main/java/com/edu/common/utils/file/MimeTypeUtils.java of the component Upload Endpoint. This manipulation of the argument File causes cross site scripting. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-100880?
How do I fix CVE-2026-100880?
No fix has been published for CVE-2026-100880 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-100880 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100880 exists.
Sources
Also known as GHSA-vmwc-7v5f-ffp7.