How severe is CVE-2021-23431?

CVE-2021-23431 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-23431 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-23431?

CVE-2021-23431 affects Joplinapp Joplin. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-23431?

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

When was CVE-2021-23431 published?

CVE-2021-23431 was published on 2021-08-24 and last updated on 2026-06-17.

CVE-2021-23431

CVE-2021-23431 is a medium-severity vulnerability in Joplinapp Joplin with a CVSS 3.x base score of 5.4. 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-352.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 6.8
EPSS exploit prediction: 0% (32nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Joplinapp Joplin
Published: 2021-08-24
Last modified: 2026-06-17

Description

The package joplin before 2.3.2 are vulnerable to Cross-site Request Forgery (CSRF) due to missing CSRF checks in various forms.

Frequently asked questions

What is CVE-2021-23431?: The package joplin before 2.3.2 are vulnerable to Cross-site Request Forgery (CSRF) due to missing CSRF checks in various forms.
How severe is CVE-2021-23431?: CVE-2021-23431 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-23431 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-23431?: CVE-2021-23431 affects Joplinapp Joplin. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-23431?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-23431 published?: CVE-2021-23431 was published on 2021-08-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:joplinapp:joplin:*:*:*:*:*:node.js:*:*

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