How severe is CVE-2021-28579?

CVE-2021-28579 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-28579 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28579?

CVE-2021-28579 affects Adobe Connect. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-28579?

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

When was CVE-2021-28579 published?

CVE-2021-28579 was published on 2021-06-28 and last updated on 2026-06-17.

CVE-2021-28579

CVE-2021-28579 is a medium-severity vulnerability in Adobe Connect with a CVSS 3.x base score of 4.3. 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: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Adobe Connect
Published: 2021-06-28
Last modified: 2026-06-17

Description

Adobe Connect version 11.2.1 (and earlier) is affected by an Improper access control vulnerability that can lead to the elevation of privileges. An attacker with 'Learner' permissions can leverage this scenario to access the list of event participants.

Frequently asked questions

What is CVE-2021-28579?: Adobe Connect version 11.2.1 (and earlier) is affected by an Improper access control vulnerability that can lead to the elevation of privileges. An attacker with 'Learner' permissions can leverage this scenario to access the list of event participants.
How severe is CVE-2021-28579?: CVE-2021-28579 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-28579 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28579?: CVE-2021-28579 affects Adobe Connect. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-28579?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-28579 published?: CVE-2021-28579 was published on 2021-06-28 and last updated on 2026-06-17.

References

https://helpx.adobe.com/security/products/connect/apsb21-36.html

Affected products (1)

cpe:2.3:a:adobe:connect:*:*:*:*:*:*:*:*

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