How severe is CVE-2023-5840?

CVE-2023-5840 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-5840 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-2023-5840?

CVE-2023-5840 affects Linkstack. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-5840?

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-2023-5840 published?

CVE-2023-5840 was published on 2023-10-29 and last updated on 2026-06-17.

CVE-2023-5840

CVE-2023-5840 is a high-severity vulnerability in Linkstack with a CVSS 3.x base score of 8.8. 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-640.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-640
Affected product: Linkstack
Published: 2023-10-29
Last modified: 2026-06-17

Description

Weak Password Recovery Mechanism for Forgotten Password in GitHub repository linkstackorg/linkstack prior to v4.2.9.

Frequently asked questions

What is CVE-2023-5840?: Weak Password Recovery Mechanism for Forgotten Password in GitHub repository linkstackorg/linkstack prior to v4.2.9.
How severe is CVE-2023-5840?: CVE-2023-5840 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-5840 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-2023-5840?: CVE-2023-5840 affects Linkstack. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-5840?: 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-2023-5840 published?: CVE-2023-5840 was published on 2023-10-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:linkstack:linkstack:*:*:*:*:*:*:*:*

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