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MEDIUM severity

Firefly III vulnerable to improper input validationGHSA-mwxw-hxvp-4r2r

MEDIUMFix: firefly-iii/firefly-iii#7043

GHSA-mwxw-hxvp-4r2r is a medium-severity (CVSS 5.9) Improper Input Validation vulnerability in grumpydictator/firefly-iii. A fix is available for grumpydictator/firefly-iii — see the affected versions and patch details below.

Also known asCVE-2023-1789
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

Proof-of-concept exploit code exists

  • CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.

Exploitation and automatability from CISA’s SSVC triage for GHSA-mwxw-hxvp-4r2r.

EPSS Exploitation Probability

via FIRST.org ↗
0.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs27th percentile — riskier than 27% of all scored CVEsHighest risk
0.00%0.28%0.56%0.83%0.2%0.3%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐘grumpydictator/firefly-iii

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Improper Input Validation in GitHub repository firefly-iii/firefly-iii prior to 6.0.0.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistgrumpydictator/firefly-iiiall versions6.0.0composer require grumpydictator/firefly-iii:^6.0.0

Affected Products

1 product · 5 configurations
Application
firefly iiifirefly-iii
< 5.7.18
2 versions
5.8.06.0.0

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for grumpydictator/firefly-iii, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update grumpydictator/firefly-iii to 6.0.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-mwxw-hxvp-4r2r is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

Firefly III versions prior to 6.0.0 are vulnerable to improper input validation.
O3 Security · Impact-Aware SCA

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Firefly III vulnerable to improper input validation