How severe is CVE-2023-40343?

CVE-2023-40343 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2023-40343 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-40343?

CVE-2023-40343 affects Jenkins Tuleap Authentication. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-40343?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-40343 published?

CVE-2023-40343 was published on 2023-08-16 and last updated on 2026-06-17.

CVE-2023-40343

CVE-2023-40343 is a medium-severity vulnerability in Jenkins Tuleap Authentication with a CVSS 3.x base score of 5.9. 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-203.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-203
Affected product: Jenkins Tuleap Authentication
Published: 2023-08-16
Last modified: 2026-06-17

Description

Jenkins Tuleap Authentication Plugin 1.1.20 and earlier uses a non-constant time comparison function when validating an authentication token allowing attackers to use statistical methods to obtain a valid authentication token.

Frequently asked questions

What is CVE-2023-40343?: Jenkins Tuleap Authentication Plugin 1.1.20 and earlier uses a non-constant time comparison function when validating an authentication token allowing attackers to use statistical methods to obtain a valid authentication token.
How severe is CVE-2023-40343?: CVE-2023-40343 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2023-40343 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-40343?: CVE-2023-40343 affects Jenkins Tuleap Authentication. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-40343?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-40343 published?: CVE-2023-40343 was published on 2023-08-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:jenkins:tuleap_authentication:*:*:*:*:*:jenkins:*:*

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