How severe is CVE-2021-34636?

CVE-2021-34636 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-34636 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-34636?

CVE-2021-34636 affects Wpdevart Countdown And Countup, Woocommerce Sales Timer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-34636?

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-2021-34636 published?

CVE-2021-34636 was published on 2021-09-28 and last updated on 2026-06-17.

CVE-2021-34636

CVE-2021-34636 is a high-severity vulnerability in Wpdevart Countdown And Countup, Woocommerce Sales Timer with a CVSS 3.x base score of 8.8. 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-352.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Wpdevart Countdown And Countup, Woocommerce Sales Timer
Published: 2021-09-28
Last modified: 2026-06-17

Description

The Countdown and CountUp, WooCommerce Sales Timers WordPress plugin is vulnerable to Cross-Site Request Forgery via the save_theme function found in the ~/includes/admin/coundown_theme_page.php file due to a missing nonce check which allows attackers to inject arbitrary web scripts, in versions up to and including 1.5.7.

Frequently asked questions

What is CVE-2021-34636?: The Countdown and CountUp, WooCommerce Sales Timers WordPress plugin is vulnerable to Cross-Site Request Forgery via the save_theme function found in the ~/includes/admin/coundown_theme_page.php file due to a missing nonce check which allows attackers to inject arbitrary web scripts, in versions up to and including 1.5.7.
How severe is CVE-2021-34636?: CVE-2021-34636 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-34636 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-34636?: CVE-2021-34636 affects Wpdevart Countdown And Countup, Woocommerce Sales Timer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-34636?: 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-2021-34636 published?: CVE-2021-34636 was published on 2021-09-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:wpdevart:countdown_and_countup\,_woocommerce_sales_timer:*:*:*:*:*:wordpress:*:*

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