How severe is CVE-2021-31745?

CVE-2021-31745 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-31745 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-31745?

CVE-2021-31745 affects Pluck-cms Pluck. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-31745?

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-2021-31745 published?

CVE-2021-31745 was published on 2021-12-10 and last updated on 2026-06-17.

CVE-2021-31745

CVE-2021-31745 is a high-severity vulnerability in Pluck-cms Pluck with a CVSS 3.x base score of 7.5. 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-384.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-384
Affected product: Pluck-cms Pluck
Published: 2021-12-10
Last modified: 2026-06-17

Description

Session Fixation vulnerability in login.php in Pluck-CMS Pluck 4.7.15 allows an attacker to sustain unauthorized access to the platform. Because Pluck does not invalidate prior sessions after a password change, access can be sustained even after an administrator performs regular remediation attempts such as resetting their password.

Frequently asked questions

What is CVE-2021-31745?: Session Fixation vulnerability in login.php in Pluck-CMS Pluck 4.7.15 allows an attacker to sustain unauthorized access to the platform. Because Pluck does not invalidate prior sessions after a password change, access can be sustained even after an administrator performs regular remediation attempts such as resetting their password.
How severe is CVE-2021-31745?: CVE-2021-31745 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-31745 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-31745?: CVE-2021-31745 affects Pluck-cms Pluck. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-31745?: 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-2021-31745 published?: CVE-2021-31745 was published on 2021-12-10 and last updated on 2026-06-17.

References

https://github.com/pluck-cms/pluck/issues/99

Affected products (1)

cpe:2.3:a:pluck-cms:pluck:4.7.15:-:*:*:*:*:*:*

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