CVE-2025-9989 broadstreetads CVE debrief

Who should care

Defenders managing WordPress multi-site installations or those with unfiltered_html disabled should assess exposure to this vulnerability, prioritize verification of the Broadstreet plugin version, and ensure proper input sanitization and output escaping to prevent exploitation.

Why it matters

CVE-2025-9989 is a Stored Cross-Site Scripting vulnerability in the Broadstreet plugin for WordPress, allowing authenticated attackers with administrator-level permissions to inject arbitrary web scripts. Defenders should prioritize verifying exposure in multi-site installations and those with unfiltered_html disabled, and ensure proper input sanitization and output escaping to prevent exploitation.

• Potential for authenticated attackers to inject arbitrary web scripts in pages.
• Execution of injected scripts when users access affected pages.
• Limited to multi-site installations and those with unfiltered_html disabled.
• Verification of exposure and remediation require checking plugin versions and configurations.

Technical summary

The Broadstreet plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings due to insufficient input sanitization and output escaping. Authenticated attackers with administrator-level permissions can inject arbitrary web scripts, affecting multi-site installations and those with unfiltered_html disabled. Defenders should prioritize verifying exposure in multi-site WordPress installations and those with unfiltered_html disabled, assessing if the Broadstreet plugin version is within the vulnerable range, and ensuring proper input sanitization and output escaping to prevent exploitation and limit potential impact.

Defensive priority

Defenders should prioritize verifying exposure in multi-site WordPress installations and those with unfiltered_html disabled, assessing if the Broadstreet plugin version is within the vulnerable range, and ensuring proper input sanitization and output escaping.

Recommended defensive actions

• Verify if the Broadstreet plugin version is within the vulnerable range (up to 1.53.1) in multi-site WordPress installations or those with unfiltered_html disabled.
• Ensure proper input sanitization and output escaping for admin settings in the Broadstreet plugin.
• Monitor for administrator-level permission usage and page access in affected installations.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE description provides details on the vulnerability, affected versions, and exploitation requirements. However, specific details about vendor remediation or affected scope beyond multi-site and unfiltered_html installations are limited.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.