How severe is CVE-2021-36911?

CVE-2021-36911 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-36911 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-36911?

CVE-2021-36911 affects Comment Engine Pro Project Comment Engine Pro. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-36911?

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

When was CVE-2021-36911 published?

CVE-2021-36911 was published on 2021-12-10 and last updated on 2026-06-17.

CVE-2021-36911

CVE-2021-36911 is a medium-severity vulnerability in Comment Engine Pro Project Comment Engine Pro with a CVSS 3.x base score of 4.8. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
CVSS v2: 3.5
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Comment Engine Pro Project Comment Engine Pro
Published: 2021-12-10
Last modified: 2026-06-17

Description

Stored Cross-Site Scripting (XSS) vulnerability discovered in WordPress Comment Engine Pro plugin (versions <= 1.0), could be exploited by users with Editor or higher role.

Frequently asked questions

What is CVE-2021-36911?: Stored Cross-Site Scripting (XSS) vulnerability discovered in WordPress Comment Engine Pro plugin (versions <= 1.0), could be exploited by users with Editor or higher role.
How severe is CVE-2021-36911?: CVE-2021-36911 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-36911 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-36911?: CVE-2021-36911 affects Comment Engine Pro Project Comment Engine Pro. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-36911?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-36911 published?: CVE-2021-36911 was published on 2021-12-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:comment_engine_pro_project:comment_engine_pro:*:*:*:*:*:wordpress:*:*

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