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SimpleHelp - Multiple Vulnerabilities

High
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Synopsis

CVE-2025-36727 Inclusion of functionality from untrusted control sphere (AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H)

It is possible to induce a client to run arbitrary code.

 

CVE-2025-36728 Cross Site Request Forgery (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L)

The server accepts parameters that can be manipulated to trick a user into unwanted actions.

 

Both of these issues used in conjunction with each other form an exploit chain that allows complete compromise of remote machines from an unauthenticated attacker.

 

Due to recent threat actor activity around remote access software, we have decided to withhold full technical details for a period of time to allow for broad patching.

Solution

Upgrade to version 5.5.12 or later.

 

CVE-2025-36728 is fixed in 5.5.11.

CVE-2025-36727 is fixed in 5.5.12.

Proof of Concept

Withheld.

Disclosure Timeline

June 3, 2025: Tenable requests security contact.
June 4, 2025: SimpleHelp provides contact.
June 4, 2025: Tenable sends disclosure email.
June 5, 2025: SimpleHelp replies asking for clarification on the first issue.
June 5, 2025: Tenable replies with clarification.
June 13, 2025: SimpleHelp replies that they will fix.
July 7, 2025: Tenable requests status update.
July 8, 2025: SimpleHelp replies that they have fixed the second issue in 5.5.11 and will fix the first issue in 5.5.12 which should ship next week.
July 23, 2025: Tenable checks if 5.5.12 will still ship soon with the expected fixes.
July 23, 2025: SimpleHelp replies that they are sorting out the announcement, but the public release is available via download.
July 24, 2025: Tenable replies with the reserved CVE IDs and stating our intent to publish and indicating that we will withhold technical details.
July 25, 2025: SimpleHelp requests we wait to publish our TRA until Monday or Tuesday.
July 25, 2025: Tenable replies that SimpleHelp as already published the fix which counts as public disclosure despite lack of release notes and messaging. We will publish as scheduled. Tenable offers to talk through this on a call.

All information within TRA advisories is provided “as is”, without warranty of any kind, including the implied warranties of merchantability and fitness for a particular purpose, and with no guarantee of completeness, accuracy, or timeliness. Individuals and organizations are responsible for assessing the impact of any actual or potential security vulnerability.

Tenable takes product security very seriously. If you believe you have found a vulnerability in one of our products, we ask that you please work with us to quickly resolve it in order to protect customers. Tenable believes in responding quickly to such reports, maintaining communication with researchers, and providing a solution in short order.

For more details on submitting vulnerability information, please see our Vulnerability Reporting Guidelines page.

If you have questions or corrections about this advisory, please email [email protected]

Risk Information

Tenable Advisory ID: TRA-2025-24
Credit:
Derrie Sutton
CVSSv3 Base / Temporal Score:
8.3
CVSSv3 Vector:
AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Affected Products:
SimpleHelp
Risk Factor:
High

Advisory Timeline

July 25, 2025: Initial release.
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