CVE-2024-3241 — The Ultimate Blocks WordPress plugin before 3

The Ultimate Blocks WordPress plugin before 3.1.7 does not validate and escape some of its block options before outputting them back in a page/post where the block is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks

01What is this vulnerability?

The Ultimate Blocks WordPress plugin before 3.1.7 does not validate and escape some of its block options before outputting them back in a page/post where the block is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks

02Affected products

Vendor	Product	Versions
Unknown	Ultimate Blocks	0

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

Open in Sigma generator →

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2024-05-14T06:00:02.064Z
• Last modified: 2024-11-07T16:24:36.657Z

09References

• wpscan.com — https://wpscan.com/vulnerability/a645daee-42ea-43f8-9480-ef3be69606e0/