What is CVE-2026-14840?

CVE-2026-14840 is a medium-severity vulnerability in Yop Poll, classified under Authentication Bypass by Spoofing. CVSS score: 5.3/10. Published 2026-08-01.

How severe is CVE-2026-14840?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Is CVE-2026-14840 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Yop Poll

CVE-2026-14840

The YOP Poll WordPress plugin before 7.0.6 does not validate the connection's origin IP address and instead trusts client-controlled forwarding headers when enforcing its per-IP vote restriction, allowing unauthenticated attackers to bypass the vote limit and cast unlimited votes on a public poll.

EPSS: 0.002 (12.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Unknown Yop Poll — versions 7.0.0

Weakness classification (CWE)

CWE-290 — Authentication Bypass by Spoofing

Public proof-of-concept exploits

nullwhisper/CVE-2026-14840

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-14840?: CVE-2026-14840 is a medium-severity vulnerability in Yop Poll, classified under Authentication Bypass by Spoofing. CVSS score: 5.3/10. Published 2026-08-01.
How severe is CVE-2026-14840?: Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2026-14840 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.