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CVE-2021-39339

20
FAUCET Score

CVE-2021-39339 is a medium-severity vulnerability affecting the Telefication WordPress plugin, specifically versions up to and including 1.8.0. It allows for Open Proxy and Server-Side Request Forgery (SSRF) due to improper handling of user-supplied URLs in the ~/bypass.php file, which are then processed by curl requests. The attack vector is network-based with low complexity, and while it doesn't impact confidentiality or integrity, it can lead to a denial of availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.8.0CPE matchmatch criteria
cpe:2.3:a:telefication:telefication:*:*:*:*:*:wordpress:*:*

CVSS Data

CVSS version used by this source: 3.1

5.8MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.38%
Probability of exploitation in next 30 days
EPSS Percentile
69.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0138 is in the 50th percentile among its peer group of 23,723 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

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