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CVE-2025-24975

Firebirdsql Firebird vulnerability

7.1 HIGHPublic exploitEPSS 0.53%
  1. Published15 Aug 2025

Description

Firebird is a relational database. Prior to snapshot versions 4.0.6.3183, 5.0.2.1610, and 6.0.0.609, Firebird is vulnerable if ExtConnPoolSize is not set equal to 0. If connections stored in ExtConnPool are not verified for presence and suitability of the CryptCallback interface is used when created versus what is available could result in a segfault in the server process. Encrypted databases, accessed by execute statement on external, may be accessed later by an attachment missing a key to that database. In a case when execute statement are chained, segfault may happen. Additionally, the segfault may affect unencrypted databases. This issue has been patched in snapshot versions 4.0.6.3183, 5.0.2.1610, and 6.0.0.609 and point releases 4.0.6 and 5.0.2. A workaround for this issue involves setting ExtConnPoolSize equal to 0 in firebird.conf.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityHigh
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityLow
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L

Affected products

Firebirdsql Firebird≥ 4.0.0 < 4.0.6 · ≥ 5.0.0 < 5.0.2

Remediation

Fixed in
Firebirdsql Firebird≥ 4.0.6

References

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Frequently asked

Is CVE-2025-24975 being actively exploited?

CVE-2025-24975 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.53%.

How severe is CVE-2025-24975?

CVE-2025-24975 has a CVSS 3.1 base score of 7.1, rated high. EPSS estimates a 0.53% probability of exploitation.

Which products are affected by CVE-2025-24975?

Affected products include Firebirdsql Firebird.

How do I fix CVE-2025-24975?

Upgrade affected software to a fixed version, for example Firebirdsql Firebird 4.0.6 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-24975 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.