CVE-2025-57205 Cross-site scripting in n/a
Authenticated attackers can inject malicious scripts into School Express content, leading to session hijacking and account takeover for other users.
- 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-2025-57205?
CVE-2025-57205 is a medium-severity cross-site scripting vulnerability in n/a, published on 22 Sep 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
iNiLabs School Express (SMS Express) 6.2 is affected by a Stored Cross-Site Scripting (XSS) vulnerability in the content-management features available to authenticated admin users. The vulnerability resides in POSTed editor parameters submitted to the /posts/edit/{id} endpoint (and similarly in Notice and Pages editors). Due to insufficient input sanitization and output encoding, attackers can inject HTML/JS payloads. The payload is saved and later rendered unsanitized, resulting in JavaScript execution in other users' browsers when they access the affected content. This issue allows an authenticated attacker to execute arbitrary JavaScript in the context of another user, potentially leading to session hijacking, privilege escalation, data exfiltration, or administrative account takeover. The application does not enforce a restrictive Content Security Policy (CSP) or adequate filtering to prevent such attacks.
Weakness: CWE-79
Which versions are affected by CVE-2025-57205?
It affects 1 product.
Products include Inilabs School Express.
How do I fix CVE-2025-57205?
No fix has been published for CVE-2025-57205 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-2025-57205 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-57205 exists.
Sources
Also known as GHSA-3f55-cgv8-774j.