How severe is CVE-2021-21080?

CVE-2021-21080 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-2021-21080 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21080?

CVE-2021-21080 affects Adobe Connect. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21080?

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

When was CVE-2021-21080 published?

CVE-2021-21080 was published on 2021-03-12 and last updated on 2026-06-17.

CVE-2021-21080

CVE-2021-21080 is a medium-severity vulnerability in Adobe Connect 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% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Adobe Connect
Published: 2021-03-12
Last modified: 2026-06-17

Description

Adobe Connect version 11.0.7 (and earlier) is affected by a reflected Cross-Site Scripting (XSS) vulnerability. An attacker could exploit this vulnerability to inject malicious JavaScript content that may be executed within the context of the victim's browser when they browse to the page containing the vulnerable field.

Frequently asked questions

What is CVE-2021-21080?: Adobe Connect version 11.0.7 (and earlier) is affected by a reflected Cross-Site Scripting (XSS) vulnerability. An attacker could exploit this vulnerability to inject malicious JavaScript content that may be executed within the context of the victim's browser when they browse to the page containing the vulnerable field.
How severe is CVE-2021-21080?: CVE-2021-21080 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-2021-21080 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21080?: CVE-2021-21080 affects Adobe Connect. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21080?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-21080 published?: CVE-2021-21080 was published on 2021-03-12 and last updated on 2026-06-17.

References

https://helpx.adobe.com/security/products/connect/apsb21-19.html

Affected products (1)

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

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