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CVE-2021-21079

21
FAUCET Score

CVE-2021-21079 describes a reflected Cross-Site Scripting (XSS) vulnerability in Adobe Connect versions 11.0.7 and earlier. An unauthenticated attacker can exploit this by injecting malicious JavaScript into a vulnerable field, which then executes in a victim's browser upon visiting the affected page. This vulnerability carries a CVSS score of 6.1 (Medium), indicating a network-based attack with low complexity requiring user interaction, potentially leading to limited confidentiality and integrity impact. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 11.0.7CPE matchmatch criteria
cpe:2.3:a:adobe:connect:*:*:*:*:*:*:*:*
<= 11.0.7CPE match
cpe:2.3:a:adobe:connect:*:*:*:*:*:-:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.13%
Probability of exploitation in next 30 days
EPSS Percentile
62.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0112 is in the 76th percentile among its peer group of 26,234 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

adobevendor investigatingvia nvd_reference
View patch

References

helpx.adobe.com / security/products/connect/apsb21-19.html
Vendor Advisory