CVE-2026-104735 themeisle CVE debrief

Who should care

WordPress administrators and users with contributor-level access and above should assess exposure and prioritize verification and remediation efforts. They should review the plugin version, update to a patched version if necessary, and implement additional security measures to prevent exploitation. Additionally, defenders should monitor for potential exploitation attempts and review user access and permissions to prevent further attacks.

Why it matters

The RSS Aggregator by Feedzy plugin for WordPress is vulnerable to Stored Cross-Site Scripting, allowing authenticated attackers to inject arbitrary web scripts.

• Authenticated attackers with contributor-level access and above can inject arbitrary web scripts.
• The payload is not neutralized at save time, bypassing any save-time wp_kses filtering.
• Malicious HTML is injected at render time from the attacker-controlled RSS feed title.
• Defenders should verify and update the plugin to a patched version, if available.

Technical summary

The RSS Aggregator by Feedzy plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Feedzy Loop Block Feed URL / RSS <title> in all versions up to, and including, 5.2.10. The vulnerability is caused by insufficient input sanitization and output escaping, allowing authenticated attackers with contributor-level access and above to inject arbitrary web scripts. The payload is not neutralized at save time, bypassing any save-time wp_kses filtering, and the malicious HTML is injected at render time from the attacker-controlled RSS feed title

Defensive priority

Defenders should prioritize verifying and updating the plugin to a patched version, if available, and monitoring for potential exploitation attempts.

Recommended defensive actions

• Verify and update the RSS Aggregator by Feedzy plugin to a patched version, if available.
• Monitor for potential exploitation attempts and review user access and permissions.
• Implement additional security measures, such as input validation and output escaping, for Feedzy Loop Block Feed URL / RSS <title> functionality.
• 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 vulnerability exists in the Feedzy Loop Block Feed URL / RSS <title> functionality, allowing authenticated attackers with contributor-level access and above to inject arbitrary web scripts. The evidence is based on the CVE record and the source item providing details on the vulnerability. The Feedzy Loop Block Feed URL / RSS <title> functionality does not properly sanitize and escape user input, leading to the Stored Cross-Site Scripting vulnerability. Defenders should verify the plugin version and update to a patched version if 5

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.