CVE-2021-41156 Reflected XSS vulnerability
Attackers can execute malicious JavaScript in logged-in users' browsers via unsanitized input, potentially leading to account takeover.
- 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-2021-41156?
CVE-2021-41156 is a medium-severity cross-site scripting vulnerability in anuko timetracker, published on 18 Oct 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
anuko/timetracker is an, open source time tracking system. In affected versions Time Tracker uses browser_today hidden control on a few pages to collect the today's date from user browsers. Because of not checking this parameter for sanity in versions prior to 1.19.30.5601, it was possible to craft an html form with malicious JavaScript, use social engineering to convince logged on users to execute a POST from such form, and have the attacker-supplied JavaScript to be executed in user's browser. This has been patched in version 1.19.30.5600. Upgrade is recommended. If it is not practical, introduce ttValidDbDateFormatDate function as in the latest version and add a call to it within the access checks block.
Weakness: CWE-79
Which versions are affected by CVE-2021-41156?
It affects 1 product.
Products include Timetracker Project Timetracker.
How do I fix CVE-2021-41156?
No fix has been published for CVE-2021-41156 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-2021-41156 being exploited?
There is no known exploitation of CVE-2021-41156 in the wild and no public exploit code.