What is CVE-2026-118639?

CVE-2026-118639 is a medium-severity vulnerability in Surfer, classified under Improper Privilege Management. CVSS score: 6.5/10. Published 2026-11-06.

How severe is CVE-2026-118639?

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

Privilege escalation in Surfer

CVE-2026-118639

The Surfer WordPress plugin before 1.8.1.759 discloses a sensitive API credential to low-privileged users through the post editor page and relies on that same credential as the sole authorization for its privileged REST API, allowing users with contributor-level access and above to read the credential and escalate to publishing arbitrary posts and other privileged actions.

Vulnerability class: Privilege Escalation

Published 2026-11-06 · last modified 2026-11-06.

CVSS v3 metric

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

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Surfer

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

References

wpscan.com/vulnerability/0cc6b6cd-ff1a-4f04-a2f5-62684abeb314/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-118639?: CVE-2026-118639 is a medium-severity vulnerability in Surfer, classified under Improper Privilege Management. CVSS score: 6.5/10. Published 2026-11-06.
How severe is CVE-2026-118639?: Medium severity. CVSS v3 base score is 6.5 out of 10.