CVE-2021-21312 Stored XSS on documents
A stored XSS vulnerability in GLPI allows attackers with document upload rights to execute arbitrary JavaScript via the Web Link field.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-21312?
CVE-2021-21312 is a medium-severity cross-site scripting vulnerability in Glpi-Project Glpi, published on 3 Mar 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
GLPI is open source software which stands for Gestionnaire Libre de Parc Informatique and it is a Free Asset and IT Management Software package. In GLPI before verison 9.5.4, there is a vulnerability within the document upload function (Home > Management > Documents > Add, or /front/document.form.php endpoint), indeed one of the form field: "Web Link" is not properly sanitized and a malicious user (who has document upload rights) can use it to deliver JavaScript payload. For example if you use the following payload: " accesskey="x" onclick="alert(1)" x=", the content will be saved within the database without any control. And then once you return to the summary documents page, by clicking on the "Web Link" of the newly created file it will create a new empty tab, but on the initial tab the pop-up "1" will appear.
Weakness: CWE-79
Which versions are affected by CVE-2021-21312?
It affects 1 product.
Products include Glpi-Project Glpi.
How do I fix CVE-2021-21312?
No fix has been published for CVE-2021-21312 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-2021-21312 being exploited?
There is no known exploitation of CVE-2021-21312 in the wild and no public exploit code.
Other vulnerabilities in Glpi-Project Glpi
- CVE-2022-35914 Teclib GLPI Remote Code Execution
- CVE-2023-42802 GLPI vulnerable to unallowed PHP script execution
- CVE-2023-28849 GLPI vulnerable to SQL injection and Stored XSS via inventory agent request
- CVE-2022-35947 SQL injection in GLPI
- CVE-2022-31056 SQL injection with _actor parameter in GLPI
Sources
Also known as GHSA-c7f6-3mr7-3rq2, UBUNTU-CVE-2021-21312.