How severe is CVE-2015-5730?

CVE-2015-5730 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2015-5730 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-5730?

CVE-2015-5730 affects Wordpress. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-5730?

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

When was CVE-2015-5730 published?

CVE-2015-5730 was published on 2015-11-09 and last updated on 2026-06-17.

CVE-2015-5730

CVE-2015-5730 is a medium-severity vulnerability in Wordpress with a CVSS 2.0 base score of 5.0. 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-200.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 8% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Wordpress
Published: 2015-11-09
Last modified: 2026-06-17

Description

The sanitize_widget_instance function in wp-includes/class-wp-customize-widgets.php in WordPress before 4.2.4 does not use a constant-time comparison for widgets, which allows remote attackers to conduct a timing side-channel attack by measuring the delay before inequality is calculated.

Frequently asked questions

What is CVE-2015-5730?: The sanitize_widget_instance function in wp-includes/class-wp-customize-widgets.php in WordPress before 4.2.4 does not use a constant-time comparison for widgets, which allows remote attackers to conduct a timing side-channel attack by measuring the delay before inequality is calculated.
How severe is CVE-2015-5730?: CVE-2015-5730 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2015-5730 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-5730?: CVE-2015-5730 affects Wordpress. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-5730?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-5730 published?: CVE-2015-5730 was published on 2015-11-09 and last updated on 2026-06-17.

References

Affected products (1)

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

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