What is CVE-2021-39339?

CVE-2021-39339 is a medium-severity vulnerability in Telefication, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.8/10. Published 2021-09-22.

How severe is CVE-2021-39339?

Medium severity. CVSS v3 base score is 5.8 out of 10.

Is CVE-2021-39339 known to be exploited?

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

SSRF in Telefication

CVE-2021-39339

The Telefication WordPress plugin is vulnerable to Open Proxy and Server-Side Request Forgery via the ~/bypass.php file due to a user-supplied URL request value that gets called by a curl requests. This affects versions up to, and including, 1.8.0.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2021-09-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.014 (71.1th percentile), scored 2026-10-06.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Telefication — versions 1.8.0

Weakness classification (CWE)

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

Public proof-of-concept exploits

20142995/nuclei-templates

References

www.wordfence.com/vulnerability-advisories/ (Third Party Advisory)
plugins.trac.wordpress.org/browser/telefication/tags/1.8.0/bypass.php (Third Party Advisory)

Frequently asked questions

What is CVE-2021-39339?: CVE-2021-39339 is a medium-severity vulnerability in Telefication, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.8/10. Published 2021-09-22.
How severe is CVE-2021-39339?: Medium severity. CVSS v3 base score is 5.8 out of 10.
Is CVE-2021-39339 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.