CVE-2019-13646 Firefly III vulnerable to reflected cross-site scripting

Medium 5.4 Published 18 Jul 2019 Updated 4 Aug 2024

Reflected XSS in Firefly III allows attackers to execute scripts in victim browsers, requiring similar access rights to the victim.

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: Available

What is CVE-2019-13646?

CVE-2019-13646 is a medium-severity cross-site scripting vulnerability in n/a, published on 18 Jul 2019. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

Firefly III before 4.7.17.3 is vulnerable to reflected XSS due to lack of filtration of user-supplied data in a search query. NOTE: It is asserted that an attacker must have the same access rights as the user in order to be able to execute the vulnerability

Weakness: CWE-79

Which versions are affected by CVE-2019-13646?

2 open source packages ship an affected version, including grumpydictator/firefly-iii. It affects 1 product.

Package	Affected	Fixed in
`grumpydictator/firefly-iii` Packagist	All versions	`4.7.17.3`
`grumpydictator/firefly-iii` Packagist	All versions	`4.7.17.3`

Products include Firefly-Iii Firefly Iii.

How do I fix CVE-2019-13646?

Upgrade grumpydictator/firefly-iii to 4.7.17.3 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-2019-13646 being exploited?

There is no known exploitation of CVE-2019-13646 in the wild and no public exploit code.

Sources

Also known as GHSA-mrc2-h7q2-pp97.