How severe is CVE-2021-37598?

CVE-2021-37598 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-37598 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-37598?

CVE-2021-37598 affects Wpcerber Wp Cerber. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-37598?

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

When was CVE-2021-37598 published?

CVE-2021-37598 was published on 2021-08-19 and last updated on 2026-06-17.

CVE-2021-37598

CVE-2021-37598 is a medium-severity vulnerability in Wpcerber Wp Cerber with a CVSS 3.x base score of 5.3. 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-863.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Wpcerber Wp Cerber
Published: 2021-08-19
Last modified: 2026-06-17

Description

WP Cerber before 8.9.3 allows bypass of /wp-json access control via a trailing ? character.

Frequently asked questions

What is CVE-2021-37598?: WP Cerber before 8.9.3 allows bypass of /wp-json access control via a trailing ? character.
How severe is CVE-2021-37598?: CVE-2021-37598 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-37598 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-37598?: CVE-2021-37598 affects Wpcerber Wp Cerber. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-37598?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-37598 published?: CVE-2021-37598 was published on 2021-08-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:wpcerber:wp_cerber:*:*:*:*:*:*:*:*

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