How severe is CVE-2019-18834?

CVE-2019-18834 has a CVSS 3.x base score of 6.1, 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-2019-18834 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-18834?

CVE-2019-18834 affects Woocommerce Subscriptions. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-18834?

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

When was CVE-2019-18834 published?

CVE-2019-18834 was published on 2020-07-23 and last updated on 2026-06-17.

CVE-2019-18834

CVE-2019-18834 is a medium-severity vulnerability in Woocommerce Subscriptions with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Woocommerce Subscriptions
Published: 2020-07-23
Last modified: 2026-06-17

Description

Persistent XSS in the WooCommerce Subscriptions plugin before 2.6.3 for WordPress allows remote attackers to execute arbitrary JavaScript because Billing Details are mishandled in WCS_Admin_Post_Types in class-wcs-admin-post-types.php.

Frequently asked questions

What is CVE-2019-18834?: Persistent XSS in the WooCommerce Subscriptions plugin before 2.6.3 for WordPress allows remote attackers to execute arbitrary JavaScript because Billing Details are mishandled in WCS_Admin_Post_Types in class-wcs-admin-post-types.php.
How severe is CVE-2019-18834?: CVE-2019-18834 has a CVSS 3.x base score of 6.1, 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-2019-18834 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-18834?: CVE-2019-18834 affects Woocommerce Subscriptions. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-18834?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-18834 published?: CVE-2019-18834 was published on 2020-07-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:woocommerce:subscriptions:*:*:*:*:*:wordpress:*:*

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