Zenity Labs Unveils Serious Zero-Click Vulnerabilities in Salesforce Agentforce
In a pivotal disclosure, security researchers at Zenity Labs revealed a series of zero-click vulnerabilities within Salesforce Agentforce, allowing attackers to deftly exfiltrate sensitive customer relationship management (CRM) data, all without requiring any interaction from the victim and without the need for the attacker to authenticate into the target’s Salesforce environment. This alarming finding underscores a critical threat in the increasingly interconnected digital landscape.
On September 24, Zenity’s threat research team released detailed findings outlining the attack chain, which they have aptly named “SalesBleed.”
The Mechanics of SalesBleed
The report highlights a particular method by which attackers could implement hidden prompt injection payloads into public-facing Web-to-Lead forms. This Salesforce feature enables external users to submit data that seamlessly integrates into CRM records. The precision of this method lies in the fact that when an Agentforce agent processes the record as part of routine business activities, the embedded malicious instructions would hijack the agent’s behavior.
The mechanics of the attack chain incorporate three critical components:
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Prompt Injection via Web-to-Lead Forms: This element grants the agent the capability to ingest untrusted external input.
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Trust in Record Content: The agent is designed to render links or images back to a user interface, thus creating an opportunity for exploitation.
- Access to Sensitive Tools and Data Permissions: The agent operates with underlying permissions that allow access to confidential information and resources.
Once activated, the malicious payload could direct the agent to conduct covert queries, ultimately extracting sensitive account data such as company names, deal sizes, and various other confidential CRM fields. This was achieved through DNS-based exfiltration techniques, which successfully bypassed Salesforce’s Trusted URLs redaction controls, a safety measure meant to thwart such data leaks through outbound links.
Remarkably, the entire process could be executed without any direct access to the target organization, emphasizing the systemic risk posed by such vulnerabilities. The simple act of submitting a lead was sufficient to introduce the payload, with the normal operations of the agent handling the rest.
Response and Remediation
In June, Zenity Labs reported these vulnerabilities to Salesforce, leading to a prompt response. Salesforce implemented a comprehensive fix for the URL redaction bypass issue, which addressed the vulnerabilities identified, successfully remediating the risks by August 18.
Implications for AI and CRM Systems
While the vulnerabilities presented in the SalesBleed attack have now been resolved, researchers from Zenity have issued a stern warning regarding the broader implications of their findings. They noted that the risk pattern observed is not exclusive to the Agentforce platform. Any AI agent that processes records submitted from untrusted external sources—and is capable of rendering links or images back to users while holding access to sensitive backend data—faces similar vulnerabilities.
According to the Zenity report, “Our payload asked for company names and deal sizes, but the injection could have asked for anything that the subagent’s Query Records tool can reach (which can include sensitive data). In a typical CRM deployment, this encompasses accounts, contacts, and a multitude of other sensitive data types.”
The overarching message is clear: organizations relying on AI-driven agents must be vigilant. The combination of untrusted input sources, the ability to render rich content, and access to sensitive data together form a dangerous trifecta that can be exploited by malicious actors.
As the digital environment continues to evolve, distinguishing between trusted and untrusted sources will be essential for protecting sensitive information. Organizations need to fortify their systems against such vulnerabilities, ensuring that safety measures are not merely reactive, but proactive, in the face of increasingly sophisticated cyber threats.
The disclosure by Zenity Labs serves as a critical reminder of the vulnerabilities inherent in modern CRM systems, spotlighting the urgent need for enhanced security protocols and a comprehensive understanding of the risks associated with AI-driven technologies in business environments.