CVE-2026-109936: high-severity vulnerability in Otter Blocks
Otter Blocks < 3.2.8 - Unauthenticated Stored XSS via Dynamic Content Render Filter
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 7.5epss 0.3%
The Otter Blocks WordPress plugin before 3.2.8 does not correctly bound a pattern it uses to rewrite its dynamic-content tokens while rendering blocks, so the pattern can consume the quote that closes an HTML attribute and pull adjacent unescaped data into the markup as new attributes. This allows unauthenticated users to achieve stored Cross-Site Scripting that executes in the browser of any visitor who views an affected page, including a logged-in administrator.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
Unknown · Otter Blockspublic PoCs found — 1
cve_referencewpscan.com/vulnerability/c9f264ad-0857-4d1f-9f20-694469d7bee0/unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — Otter Blocks
In the same product, most dangerous first.
CVE-2024-2729MEDIUMOtter Blocks < 2.6.6 - Contributor+ Stored XSSEPSS 0.4%CVE-2026-109933MEDIUMOtter Blocks < 3.2.8 - Contributor+ Stored XSS via Block Style AttributesEPSS 0.3%CVE-2026-109935MEDIUMOtter Blocks < 3.2.8 - Unauthenticated Restricted Block Content Disclosure via REST APIEPSS 0.3%CVE-2026-109934MEDIUMOtter Blocks 3.1.1 - 3.2.7 - Unauthenticated Non-Public Content Disclosure via REST APIEPSS 0.3%CVE-2026-109937MEDIUMOtter Blocks < 3.2.3 - Unauthenticated Open Redirect via Stripe Checkout BlockEPSS 0.1%