CVE-2021-45416 RosarioSIS XSS Vulnerability

Medium 6.1 Published 1 Feb 2022 Updated 9 Jul 2026

Attackers can inject arbitrary HTML via the search_term parameter in the Scheduling module, potentially leading to session hijacking or malicious script execution.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2021-45416?

CVE-2021-45416 is a medium-severity cross-site scripting vulnerability in n/a, published on 1 Feb 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Reflected Cross-site scripting (XSS) vulnerability in RosarioSIS 8.2.1 allows attackers to inject arbitrary HTML via the search_term parameter in the modules/Scheduling/Courses.php script.

Weakness: CWE-79

Which versions are affected by CVE-2021-45416?

2 open source packages ship an affected version, including francoisjacquet/rosariosis. It affects 1 product.

Package	Affected	Fixed in
`francoisjacquet/rosariosis` Packagist	All versions	`8.3`
`francoisjacquet/rosariosis` Packagist	All versions	`8.3`

Products include Rosariosis Rosariosis.

How do I fix CVE-2021-45416?

Upgrade francoisjacquet/rosariosis to 8.3 or later.

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-2021-45416 being exploited?

There is no known exploitation of CVE-2021-45416 in the wild and no public exploit code.

Public exploit code: 2 proofs of concept on GitHub.

Sources

Also known as GHSA-287r-574x-f4h4.