ConnectWise Fixes XSS Vulnerability that Could Lead to Remote Code Execution

Distant checking and administration (RMM) system ConnectWise has patched a cross-site scripting (XSS) vulnerability that could guide to distant code execution (RCE).

Security scientists at Guardio Labs wrote about the flaw before this week, stating danger actors could exploit it to just take total handle of the ConnectWise platform.

“After screening and validating numerous attack vectors, we have identified that in the scenario of the Website page.Title resource, the [user input validation] is not getting taken care of, leaving it vulnerable to a ‘Stored XSS’ exploitation,” reads the Guardio Labs advisory.

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“The user’s input is inserted specifically, as is, in in between the tags on any website page of the web application.”

The security firm also extra that this bundled the landing page for visitors (where by they could enter their guidance code and probably put in a distant access Trojan), the admin login page and any of the inner admin web pages.

“Any code we maliciously inject in among the tags with some manipulations is executed as any other code in the context of the web app – as if it was authored by the official owner of the assistance.”

Guardio Labs stated that a script executing from this context would give an attacker total regulate above any element of the web app, possibly altering things on the web site as very well as link to the backend servers.

“This can hurt any probable customer [or] be applied to abuse the hosting products and services itself – permitting misuse of ConnectWise hosting, id, and certification to provide malicious code or acquire entire entry to admin web pages even immediately after the trial period of time is more than,” reads the specialized publish-up.

Guardio Labs verified it disclosed the vulnerability before this calendar year, which ConnectWise immediately patched on August 8, 2022, in v22.6.

“As requested by ConnectWise, we waited at minimum 30 a lot more times just before this disclosure so on-prem buyers will get the probability to update their installations as perfectly,” clarified the firm.

The resolve arrives weeks soon after IBM found an RCE vulnerability in Cobalt Strike deriving from an current and partly unpatched XSS flaw.