What is CVE-2026-1900?

CVE-2026-1900 is a medium-severity vulnerability in Linkwhisper Link Whisper, classified under Missing Authentication for Critical Function. CVSS score: 6.5/10. Published 2026-04-07.

How severe is CVE-2026-1900?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Linkwhisper Link Whisper

CVE-2026-1900

The Link Whisper Free WordPress plugin before 0.9.1 has a publicly accessible REST endpoint that allows unauthenticated settings updates.

Vulnerability class: Broken Authentication

Published 2026-04-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (7.4th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Linkwhisper Link Whisper
Link Whisper Free — versions 0

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

wpscan.com/vulnerability/dc10b627-7981-4c53-bc9d-e87418f3fcfc/ (Exploit, technical-description, Third Party Advisory, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-1900?: CVE-2026-1900 is a medium-severity vulnerability in Linkwhisper Link Whisper, classified under Missing Authentication for Critical Function. CVSS score: 6.5/10. Published 2026-04-07.
How severe is CVE-2026-1900?: Medium severity. CVSS v3 base score is 6.5 out of 10.