How severe is CVE-2022-4939?

CVE-2022-4939 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-4939 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-4939?

CVE-2022-4939 affects Wclovers Wcfm Membership. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-4939?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2022-4939 published?

CVE-2022-4939 was published on 2023-04-05 and last updated on 2026-06-17.

CVE-2022-4939

CVE-2022-4939 is a critical-severity vulnerability in Wclovers Wcfm Membership with a CVSS 3.x base score of 9.8. 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-862.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-862
Affected product: Wclovers Wcfm Membership
Published: 2023-04-05
Last modified: 2026-06-17

Description

THe WCFM Membership plugin for WordPress is vulnerable to privilege escalation in versions up to, and including 2.10.0, due to a missing capability check on the wp_ajax_nopriv_wcfm_ajax_controller AJAX action that controls membership settings. This makes it possible for unauthenticated attackers to modify the membership registration form in a way that allows them to set the role for registration to that of any user including administrators. Once configured, the attacker can then register as an administrator.

Frequently asked questions

What is CVE-2022-4939?: THe WCFM Membership plugin for WordPress is vulnerable to privilege escalation in versions up to, and including 2.10.0, due to a missing capability check on the wp_ajax_nopriv_wcfm_ajax_controller AJAX action that controls membership settings. This makes it possible for unauthenticated attackers to modify the membership registration form in a way that allows them to set the role for registration to that of any user including administrators. Once configured, the attacker can then register as an administrator.
How severe is CVE-2022-4939?: CVE-2022-4939 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-4939 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-4939?: CVE-2022-4939 affects Wclovers Wcfm Membership. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-4939?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2022-4939 published?: CVE-2022-4939 was published on 2023-04-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:wclovers:wcfm_membership:*:*:*:*:*:wordpress:*:*

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