How severe is CVE-2023-1789?

CVE-2023-1789 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-1789 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-1789?

CVE-2023-1789 primarily affects Firefly-iii Firefly Iii. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-1789?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-1789 published?

CVE-2023-1789 was published on 2023-04-01 and last updated on 2026-06-17.

CVE-2023-1789

CVE-2023-1789 is a critical-severity vulnerability in Firefly-iii Firefly Iii with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Firefly-iii Firefly Iii
Published: 2023-04-01
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2023-1789?: Improper Input Validation in GitHub repository firefly-iii/firefly-iii prior to 6.0.0.
How severe is CVE-2023-1789?: CVE-2023-1789 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-1789 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-1789?: CVE-2023-1789 primarily affects Firefly-iii Firefly Iii. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-1789?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-1789 published?: CVE-2023-1789 was published on 2023-04-01 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:a:firefly-iii:firefly_iii:*:*:*:*:*:*:*:*
cpe:2.3:a:firefly-iii:firefly_iii:5.8.0:alpha1:*:*:*:*:*:*
cpe:2.3:a:firefly-iii:firefly_iii:6.0.0:alpha1:*:*:*:*:*:*
cpe:2.3:a:firefly-iii:firefly_iii:6.0.0:alpha2:*:*:*:*:*:*
cpe:2.3:a:firefly-iii:firefly_iii:6.0.0:beta1:*:*:*:*:*:*

More vulnerabilities in Firefly-iii Firefly Iii

CVE-2023-1788 — Critical (CVSS 9.8): Insufficient Session Expiration in GitHub repository firefly-iii/firefly-iii prior to 6.
CVE-2021-3901 — High (CVSS 8.8): firefly-iii is vulnerable to Cross-Site Request Forgery (CSRF)
CVE-2021-3846 — High (CVSS 8.8): firefly-iii is vulnerable to Unrestricted Upload of File with Dangerous Type
CVE-2021-3819 — High (CVSS 8.8): firefly-iii is vulnerable to Cross-Site Request Forgery (CSRF)
CVE-2021-3663 — High (CVSS 7.5): firefly-iii is vulnerable to Improper Restriction of Excessive Authentication Attempts
CVE-2023-0298 — Medium (CVSS 6.5): Incorrect Authorization in GitHub repository firefly-iii/firefly-iii prior to 5.8.0.

All CVEs affecting Firefly-iii Firefly Iii →

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