How severe is CVE-2021-24881?

CVE-2021-24881 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-2021-24881 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-24881?

CVE-2021-24881 affects Passster Project Passter. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-24881?

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-2021-24881 published?

CVE-2021-24881 was published on 2023-01-23 and last updated on 2026-06-17.

CVE-2021-24881

CVE-2021-24881 is a high-severity vulnerability in Passster Project Passter 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.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Passster Project Passter
Published: 2023-01-23
Last modified: 2026-06-17

Description

The Passster WordPress plugin before 3.5.5.9 does not properly check for password, as well as that the post to be viewed is public, allowing unauthenticated users to bypass the protection offered by the plugin, and access arbitrary posts (such as private) content, by sending a specifically crafted request.

Frequently asked questions

What is CVE-2021-24881?: The Passster WordPress plugin before 3.5.5.9 does not properly check for password, as well as that the post to be viewed is public, allowing unauthenticated users to bypass the protection offered by the plugin, and access arbitrary posts (such as private) content, by sending a specifically crafted request.
How severe is CVE-2021-24881?: CVE-2021-24881 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-2021-24881 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-24881?: CVE-2021-24881 affects Passster Project Passter. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-24881?: 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-2021-24881 published?: CVE-2021-24881 was published on 2023-01-23 and last updated on 2026-06-17.

References

https://wpscan.com/vulnerability/0967303d-ea49-4993-84eb-a7ec97240071

Affected products (1)

cpe:2.3:a:passster_project:passter:*:*:*:*:*:wordpress:*:*

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