How severe is CVE-2023-4423?

CVE-2023-4423 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over network with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2023-4423 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-4423?

CVE-2023-4423 affects Wp-eventmanager Wp Event Manager. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-4423?

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

When was CVE-2023-4423 published?

CVE-2023-4423 was published on 2023-09-27 and last updated on 2026-06-17.

CVE-2023-4423

CVE-2023-4423 is a medium-severity vulnerability in Wp-eventmanager Wp Event Manager with a CVSS 3.x base score of 4.4. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.4)
EPSS exploit prediction: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Wp-eventmanager Wp Event Manager
Published: 2023-09-27
Last modified: 2026-06-17

Description

The WP Event Manager – Events Calendar, Registrations, Sell Tickets with WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in versions up to, and including, 3.1.37.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

Frequently asked questions

What is CVE-2023-4423?: The WP Event Manager – Events Calendar, Registrations, Sell Tickets with WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in versions up to, and including, 3.1.37.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
How severe is CVE-2023-4423?: CVE-2023-4423 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over network with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2023-4423 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-4423?: CVE-2023-4423 affects Wp-eventmanager Wp Event Manager. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-4423?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-4423 published?: CVE-2023-4423 was published on 2023-09-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:wp-eventmanager:wp_event_manager:*:*:*:*:*:wordpress:*:*

More vulnerabilities in Wp-eventmanager Wp Event Manager

CVE-2025-2800 — High (CVSS 7.2): The WP Event Manager – Events Calendar, Registrations, Sell Tickets with WooCommerce plugin for WordPress is…
CVE-2023-47697 — High (CVSS 7.1): Unauth. Reflected Cross-Site Scripting (XSS) vulnerability in WP Event Manager WP Event Manager – Events Calendar,…
CVE-2023-52118 — Medium (CVSS 6.5): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WP Event Manager…
CVE-2024-2691 — Medium (CVSS 6.4): The WP Event Manager – Events Calendar, Registrations, Sell Tickets with WooCommerce plugin for WordPress is…
CVE-2024-0976 — Medium (CVSS 6.1): The WP Event Manager – Events Calendar, Registrations, Sell Tickets with WooCommerce plugin for WordPress is…
CVE-2022-1474 — Medium (CVSS 6.1): The WP Event Manager WordPress plugin before 3.1.28 does not sanitise and escape its search before outputting it back…

All CVEs affecting Wp-eventmanager Wp Event Manager →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →