How severe is CVE-2023-28121?

CVE-2023-28121 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-2023-28121 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 87% (100th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-28121?

CVE-2023-28121 primarily affects Automattic Woocommerce Payments. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-28121?

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-2023-28121 published?

CVE-2023-28121 was published on 2023-04-12 and last updated on 2026-06-17.

CVE-2023-28121

CVE-2023-28121 is a critical-severity vulnerability in Automattic Woocommerce Payments with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 87% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 87% (100th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Automattic Woocommerce Payments
Published: 2023-04-12
Last modified: 2026-06-17

Description

An issue in WooCommerce Payments plugin for WordPress (versions 5.6.1 and lower) allows an unauthenticated attacker to send requests on behalf of an elevated user, like administrator. This allows a remote, unauthenticated attacker to gain admin access on a site that has the affected version of the plugin activated.

Frequently asked questions

What is CVE-2023-28121?: An issue in WooCommerce Payments plugin for WordPress (versions 5.6.1 and lower) allows an unauthenticated attacker to send requests on behalf of an elevated user, like administrator. This allows a remote, unauthenticated attacker to gain admin access on a site that has the affected version of the plugin activated.
How severe is CVE-2023-28121?: CVE-2023-28121 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-2023-28121 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 87% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-28121?: CVE-2023-28121 primarily affects Automattic Woocommerce Payments. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-28121?: 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-2023-28121 published?: CVE-2023-28121 was published on 2023-04-12 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:a:automattic:woocommerce_payments:*:*:*:*:*:wordpress:*:*
cpe:2.3:a:automattic:woopayments:*:*:*:*:*:wordpress:*:*
cpe:2.3:a:automattic:woopayments:4.9.0:*:*:*:*:wordpress:*:*
cpe:2.3:a:automattic:woopayments:5.3.0:*:*:*:*:wordpress:*:*
cpe:2.3:a:automattic:woopayments:5.4.0:*:*:*:*:wordpress:*:*

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