How severe is CVE-2021-36863?

CVE-2021-36863 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-36863 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-36863?

CVE-2021-36863 affects Expresstech Quiz And Survey Master. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-36863?

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

When was CVE-2021-36863 published?

CVE-2021-36863 was published on 2022-10-28 and last updated on 2026-06-17.

CVE-2021-36863

CVE-2021-36863 is a medium-severity vulnerability in Expresstech Quiz And Survey Master with a CVSS 3.x base score of 5.4. 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 3.x base score 5.4)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Expresstech Quiz And Survey Master
Published: 2022-10-28
Last modified: 2026-06-17

Description

Auth. (contributor+) Stored Cross-Site Scripting (XSS) vulnerability in ExpressTech Quiz And Survey Master plugin <= 7.3.4 on WordPress.

Frequently asked questions

What is CVE-2021-36863?: Auth. (contributor+) Stored Cross-Site Scripting (XSS) vulnerability in ExpressTech Quiz And Survey Master plugin <= 7.3.4 on WordPress.
How severe is CVE-2021-36863?: CVE-2021-36863 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-36863 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-36863?: CVE-2021-36863 affects Expresstech Quiz And Survey Master. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-36863?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-36863 published?: CVE-2021-36863 was published on 2022-10-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:expresstech:quiz_and_survey_master:*:*:*:*:*:wordpress:*:*

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