Adobe Connect < 11.2.3 Multiple Vulnerabilities (APSB21-91)

critical Nessus Plugin ID 154144


The remote web server contains an application that is affected by multiple vulnerabilities.


The version of Adobe Connect running on the remote host is 11.2.2 or earlier. It is, therefore, affected by multiple vulnerabilities.

- An unsafe deserialization vulnerability exists in Adobe Connect. An unauthenticated, remote attacker can exploit this to execute arbitrary code on the target host. (CVE-2021-40719)

- A reflected cross-site scripting (XSS) vulnerability exists in Adobe Connect due to improper validation of user-supplied input before returning it to users. An unauthenticated, remote attacker can exploit this, by convincing a user to click a specially crafted URL, to execute arbitrary script code in a user's browser session.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.


Upgrade to Adobe Connect version 11.2.3 or later

See Also

Plugin Details

Severity: Critical

ID: 154144

File Name: adobe_connect_apsb21-91.nasl

Version: 1.6

Type: remote

Family: CGI abuses

Published: 10/14/2021

Updated: 6/28/2022

Risk Information


Risk Factor: Medium

Score: 5.9


Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS Score Source: CVE-2021-40719


Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

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

Required KB Items: installed_sw/Adobe Connect

Exploit Ease: No known exploits are available

Patch Publication Date: 10/12/2021

Vulnerability Publication Date: 10/12/2021

Reference Information

CVE: CVE-2021-40719, CVE-2021-40721

IAVB: 2021-B-0058-S