How severe is CVE-2021-39333?

CVE-2021-39333 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2021-39333 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-39333?

CVE-2021-39333 affects Hashthemes Hashthemes Demo Importer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-39333?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-39333 published?

CVE-2021-39333 was published on 2021-11-01 and last updated on 2026-06-17.

CVE-2021-39333

CVE-2021-39333 is a high-severity vulnerability in Hashthemes Hashthemes Demo Importer with a CVSS 3.x base score of 8.1. 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-284.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 5.5
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Hashthemes Hashthemes Demo Importer
Published: 2021-11-01
Last modified: 2026-06-17

Description

The Hashthemes Demo Importer Plugin <= 1.1.1 for WordPress contained several AJAX functions which relied on a nonce which was visible to all logged-in users for access control, allowing them to execute a function that truncated nearly all database tables and removed the contents of wp-content/uploads.

Frequently asked questions

What is CVE-2021-39333?: The Hashthemes Demo Importer Plugin <= 1.1.1 for WordPress contained several AJAX functions which relied on a nonce which was visible to all logged-in users for access control, allowing them to execute a function that truncated nearly all database tables and removed the contents of wp-content/uploads.
How severe is CVE-2021-39333?: CVE-2021-39333 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2021-39333 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-39333?: CVE-2021-39333 affects Hashthemes Hashthemes Demo Importer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-39333?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-39333 published?: CVE-2021-39333 was published on 2021-11-01 and last updated on 2026-06-17.

References

https://www.wordfence.com/blog/2021/10/site-deletion-vulnerability-in-hashthemes-plugin/

Affected products (1)

cpe:2.3:a:hashthemes:hashthemes_demo_importer:*:*:*:*:*:wordpress:*:*

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