CVE-2026-109937
Otter Blocks < 3.2.3 - Unauthenticated Open Redirect via Stripe Checkout Block
Unknown Otter Blocks
CVSS
5.4MediumExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.15%Chance of exploitation activity in the next 30 days, higher than 3% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 3.2.3Otter BlocksCVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Description
The Otter Blocks WordPress plugin before 3.2.3 does not validate that a user-supplied return URL belongs to the site before using it to build the return destination of a Stripe Checkout session, allowing unauthenticated attackers to redirect victims who complete or cancel checkout to an arbitrary external URL.
Text from CVE List
Affected versions 1
- Otter Blocksaffected: all versions before 3.2.3CVE List