CVE-2021-39339: The Telefication WordPress plugin is vulnerable to Open Proxy and Server-Side Request Forgery via the ~/bypass

Q: How do I fix CVE-2021-39339?

telefication: upgrade to newer than 1.8.0. Exact commands for each OS are on this page.

Q: Is CVE-2021-39339 being exploited?

CVE-2021-39339 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-39339 affect?

CVE-2021-39339 affects telefication. Severity is medium (CVSS 5.8). 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

Q: How urgent is CVE-2021-39339?

Priority 43/100. Remotely exploitable, no login, no user action

This month

MEDIUM 5.8REMOTEUPGRADE

CVE-2021-39339 is a medium-severity flaw (CVSS 5.8) affecting telefication. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.8 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 28%)
CISA exploited list	No
Weakness	CWE-918
Published	2021-09-22
Last modified	2026-06-17

Publisher (CNA): Wordfence · Vendor: telefication

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-09-22 11:15 UTCPublished CVE record published
2026-06-17 04:03 UTCUpdated Record last modified

telefication telefication UPGRADE

Affected: <= 1.8.0

Fixed in: newer than 1.8.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy telefication || rpm -q telefication || telefication --version

2. UPGRADE to newer than 1.8.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade telefication

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade telefication

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-39339?

telefication: upgrade to newer than 1.8.0. Exact commands for each OS are on this page.

Is CVE-2021-39339 being exploited?

CVE-2021-39339 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-39339 affect?

CVE-2021-39339 affects telefication. Severity is medium (CVSS 5.8). 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

How urgent is CVE-2021-39339?

Priority 43/100. Remotely exploitable, no login, no user action

Software pages

WordPress vulnerabilities · PHP vulnerabilities · curl vulnerabilities

References

← Back to latest CVEs