CVE-2023-2600: Custom Base Terms < 1.0.3 - Admin+ Stored XSS

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-06-19 · updated 2026-06-17

Description

The Custom Base Terms WordPress plugin before 1.0.3 does not sanitize and escape some of its settings, which could allow high-privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)

Affected products

Custom Base Terms: before 1.0.3 — fixed in 1.0.3

How to fix

Upgrade to a fixed version: Custom Base Terms 1.0.3. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/8e1d65c3-14e4-482f-ae9e-323e847a8613
https://wpscan.com/vulnerability/8e1d65c3-14e4-482f-ae9e-323e847a8613

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