How severe is CVE-2015-4413?

CVE-2015-4413 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2015-4413 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-4413?

CVE-2015-4413 affects Nextendweb Facebook Connect. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-4413?

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

When was CVE-2015-4413 published?

CVE-2015-4413 was published on 2015-06-24 and last updated on 2026-06-17.

CVE-2015-4413

CVE-2015-4413 is a medium-severity vulnerability in Nextendweb Facebook Connect with a CVSS 2.0 base score of 4.3. 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-79.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Nextendweb Facebook Connect
Published: 2015-06-24
Last modified: 2026-06-17

Description

Cross-site scripting (XSS) vulnerability in the new_fb_sign_button function in nextend-facebook-connect.php in Nextend Facebook Connect plugin before 1.5.6 for WordPress allows remote attackers to inject arbitrary web script or HTML via the redirect_to parameter.

Frequently asked questions

What is CVE-2015-4413?: Cross-site scripting (XSS) vulnerability in the new_fb_sign_button function in nextend-facebook-connect.php in Nextend Facebook Connect plugin before 1.5.6 for WordPress allows remote attackers to inject arbitrary web script or HTML via the redirect_to parameter.
How severe is CVE-2015-4413?: CVE-2015-4413 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2015-4413 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-4413?: CVE-2015-4413 affects Nextendweb Facebook Connect. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-4413?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-4413 published?: CVE-2015-4413 was published on 2015-06-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nextendweb:facebook_connect:*:*:*:*:*:wordpress:*:*

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