How severe is CVE-2021-39339?

CVE-2021-39339 has a CVSS 3.x base score of 5.8, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2021-39339 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-39339?

CVE-2021-39339 affects Telefication. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-39339?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-39339 published?

CVE-2021-39339 was published on 2021-09-22 and last updated on 2026-06-17.

CVE-2021-39339

CVE-2021-39339 is a medium-severity vulnerability in Telefication with a CVSS 3.x base score of 5.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

Severity: Medium (CVSS 3.x base score 5.8)
CVSS v2: 5.0
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-918
Affected product: Telefication
Published: 2021-09-22
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2021-39339?: CVE-2021-39339 has a CVSS 3.x base score of 5.8, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2021-39339 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-39339?: CVE-2021-39339 affects Telefication. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-39339?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-39339 published?: CVE-2021-39339 was published on 2021-09-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:telefication:telefication:*:*:*:*:*:wordpress:*:*

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