What is CVE-2020-23534?

CVE-2020-23534 is a critical-severity vulnerability in Masterlab, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.8/10. Published 2021-02-25.

How severe is CVE-2020-23534?

Critical severity. CVSS v3 base score is 9.8 out of 10.

SSRF in Masterlab

CVE-2020-23534

A server-side request forgery (SSRF) vulnerability in Upgrade.php of gopeak masterlab 2.1.5, via the 'source' parameter.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2021-02-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.013 (68.4th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Masterlab — versions 2.1.5

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

github.com/gopeak/masterlab/issues/254 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2020-23534?: CVE-2020-23534 is a critical-severity vulnerability in Masterlab, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.8/10. Published 2021-02-25.
How severe is CVE-2020-23534?: Critical severity. CVSS v3 base score is 9.8 out of 10.