How severe is CVE-2021-28115?

CVE-2021-28115 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-28115 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28115?

CVE-2021-28115 affects Ougc Feedback Project Ougc Feedback. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-28115?

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

When was CVE-2021-28115 published?

CVE-2021-28115 was published on 2021-03-09 and last updated on 2026-06-17.

CVE-2021-28115

CVE-2021-28115 is a medium-severity vulnerability in Ougc Feedback Project Ougc Feedback with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Ougc Feedback Project Ougc Feedback
Published: 2021-03-09
Last modified: 2026-06-17

Description

The OUGC Feedback plugin before 1.8.23 for MyBB allows XSS via the comment field of feedback during an edit operation.

Frequently asked questions

What is CVE-2021-28115?: The OUGC Feedback plugin before 1.8.23 for MyBB allows XSS via the comment field of feedback during an edit operation.
How severe is CVE-2021-28115?: CVE-2021-28115 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-28115 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28115?: CVE-2021-28115 affects Ougc Feedback Project Ougc Feedback. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-28115?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-28115 published?: CVE-2021-28115 was published on 2021-03-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ougc_feedback_project:ougc_feedback:*:*:*:*:*:mybb:*:*

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