How severe is CVE-2023-6481?

CVE-2023-6481 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-6481 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-6481?

CVE-2023-6481 primarily affects Qos Logback. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-6481?

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

When was CVE-2023-6481 published?

CVE-2023-6481 was published on 2023-12-04 and last updated on 2026-06-17.

CVE-2023-6481

CVE-2023-6481 is a high-severity vulnerability in Qos Logback with a CVSS 3.x base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.1)
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Qos Logback
Published: 2023-12-04
Last modified: 2026-06-17

Description

A serialization vulnerability in logback receiver component part of logback version 1.4.13, 1.3.13 and 1.2.12 allows an attacker to mount a Denial-Of-Service attack by sending poisoned data.

Frequently asked questions

What is CVE-2023-6481?: A serialization vulnerability in logback receiver component part of logback version 1.4.13, 1.3.13 and 1.2.12 allows an attacker to mount a Denial-Of-Service attack by sending poisoned data.
How severe is CVE-2023-6481?: CVE-2023-6481 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-6481 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-6481?: CVE-2023-6481 primarily affects Qos Logback. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-6481?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-6481 published?: CVE-2023-6481 was published on 2023-12-04 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:qos:logback:1.2.12:*:*:*:*:*:*:*
cpe:2.3:a:qos:logback:1.3.13:*:*:*:*:*:*:*
cpe:2.3:a:qos:logback:1.4.13:*:*:*:*:*:*:*

More vulnerabilities in Qos Logback

CVE-2017-5929 — Critical (CVSS 9.8): QOS.ch Logback before 1.2.0 has a serialization vulnerability affecting the SocketServer and ServerSocketReceiver…
CVE-2023-6378 — High (CVSS 7.1): A serialization vulnerability in logback receiver component part of logback version 1.4.11 allows an attacker to mount…
CVE-2021-42550 — Medium (CVSS 6.6): In logback version 1.2.7 and prior versions, an attacker with the required privileges to edit configurations files…

All CVEs affecting Qos Logback →