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Vulnerabilities

Vulnerability · CVE-2026-21331

Adobe Connect versions 2025.3, 12.10 and earlier are affected by a reflected Cross-Site Scripting (XSS) vulnerability.

Published Apr 14, 2026 · catalog updated Aug 28, 2026 · Adobe Connect versions 2025.3,

Check if you run it

No confirmed exploitation is on record for CVE-2026-21331. EPSS is 0.28%. Act only if a listed version of Adobe Connect versions 2025.3, is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Adobe Connect versions 2025.3,).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.28%
Remediation
Version ranges on file
Affected products
cpe adobe/connect · cpe adobe/connect desktop application · stated connect

Adobe Connect versions 2025.3, 12.10 and earlier are affected by a reflected Cross-Site Scripting (XSS) vulnerability. If an attacker is able to convince a victim to visit a URL referencing a vulnerable page, malicious JavaScript content may be executed within the context of the victim's browser. Scope is changed.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe adobe/connectversion unspecified
  • cpe adobe/connect desktop applicationversion unspecified
  • stated connect<= 12.10

How to fix CVE-2026-21331

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-21331. EPSS is 0.28%. Act only if a listed version of Adobe Connect versions 2025.3, is installed.

Which versions are affected?

Compare what you have installed with <= 12.10. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-79: Cross-site Scripting (XSS). EPSS 0.28%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 14, 2026 · NIST NVD

    Detected

    Adobe Connect versions 2025.3, 12.10 and earlier are affected by a reflected Cross-Site Scripting (XSS) vulnerability. If an attacker is able to convince a victim to visit a URL referencing a vulnerable page, malicious JavaScript content may be executed within the context of the victim's browser. Scope is changed.

  2. Aug 28, 2026 · NIST NVD

    Updated

    Adobe Connect versions 2025.3, 12.10 and earlier are affected by a reflected Cross-Site Scripting (XSS) vulnerability. If an attacker is able to convince a victim to visit a URL referencing a vulnerable page, malicious JavaScript content may be executed within the context of the victim's browser. Scope is changed.

Sources

  • CVE.orgVulnerability recordCVE-2026-21331

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-21331

    30-day exploitation probability 0.3%

    first.org
  • NIST NVDVulnerability recordCVE-2026-21331

    Adobe Connect versions 2025.3, 12.10 and earlier are affected by a reflected Cross-Site Scripting (XSS) vulnerability. If an attacker is able to convince a victim to visit a URL referencing a vulnerable page, malicious JavaScript content may be executed within the context of the

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.