CVE-2021-3851 Open Redirect in firefly-iii/firefly-iii
Medium 5.0
Published
Updated
Check this codebase for CVE-2021-3851 and fix it if it is affected.
What it is: CVE-2021-3851 is a medium-severity vulnerability in firefly-iii/firefly-iii, published on 19 Oct 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-3851 in the wild and no public exploit code.
Affected packages and fixed versions:
- grumpydictator/firefly-iii (Packagist): affected all versions; fixed in 5.6.2
- grumpydictator/firefly-iii (Packagist): affected all versions; fixed in 5.6.2
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2021-3851/ (Markdown: https://insights.sbomify.com/CVE-2021-3851/index.md)
An attacker can redirect users to malicious sites via Firefly III, potentially facilitating phishing attacks.
- 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-2021-3851?
CVE-2021-3851 is a medium-severity vulnerability in firefly-iii/firefly-iii, published on 19 Oct 2021. 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
firefly-iii is vulnerable to URL Redirection to Untrusted Site
Weakness: CWE-601
Which versions are affected by CVE-2021-3851?
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 | 5.6.2 |
grumpydictator/firefly-iii Packagist | All versions | 5.6.2 |
Products include Firefly-Iii Firefly Iii.
How do I fix CVE-2021-3851?
Upgrade grumpydictator/firefly-iii to 5.6.2 or later.
Is CVE-2021-3851 being exploited?
There is no known exploitation of CVE-2021-3851 in the wild and no public exploit code.
Other vulnerabilities in firefly-iii/firefly-iii
- CVE-2023-0298 Incorrect Authorization in firefly-iii/firefly-iii
- CVE-2021-3728 Cross-Site Request Forgery (CSRF) in firefly-iii/firefly-iii
- CVE-2021-3730 Cross-Site Request Forgery (CSRF) in firefly-iii/firefly-iii
- CVE-2021-3846 Unrestricted Upload of File with Dangerous Type in firefly-iii/firefly-iii
- CVE-2024-22075 Firefly III allows webhooks HTML Injection.
Sources
Also known as GHSA-5fvx-5p2r-4mvp.