探花大神

Why App-to-App Connections Are Silent Security Risks

Written by Hatice Ozsahan on June 3, 2025

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Integrations are the backbone of productivity for SaaS-heavy work environments. From syncing data to automating workflows, app-to-app connections enable our tools to work smarter, not harder. But what happens when these connections happen without your knowledge?

Behind the scenes, app-to app connections can create serious security risks, often without anyone realizing it. According to a study, of organizations report external data oversharing, and 56% say employees upload sensitive data to unauthorized SaaS apps.

Without proper oversight, these connections can expose sensitive data, create compliance nightmares, and even invite potential breaches. 

In this blog, we will break down why app-to-app connections are hard to track, what makes them risky, and how 探花大神 empowers you with the visibility you need to eliminate those risks.

What Are App-to-App Connections?

As SaaS usage grows, so does the complexity of how these tools interact. App-to-app connections are a major part of that picture, allowing applications to connect directly, exchanging data or triggering actions without user involvement.

These connections are typically established through OAuth tokens or API keys, and they are often set up by end users without IT involvement. 

For example, a marketing tool might pull analytics data from another app. A support platform might post updates into a messaging tool. Over time, organizations accumulate dozens, even hundreds of these connections.

What makes app-to-app connections different from traditional user access is that:

  • They are not tied to a person, but granted by them
  • They often involve broad, persistent permissions
  • They tend to stay in place indefinitely, even after use cases change

App-to-app connections enable SaaS automation and productivity. But they also create a shadow layer of access that鈥檚 difficult to audit and easy to overlook, especially when tools change, teams move on, or offboarding doesn鈥檛 include a full integration review.

54% of employees are turning to unauthorized applications to make their job easier.

2025 SME IT Trends Report: Simplifying IT in the Fast Lane of Change

What Makes Them Difficult to Track?

App-to-app connections are inherently challenging to track and manage for several reasons, making them a critical yet overlooked security concern. 

Unlike user-based permissions or direct access controls, app-to-app connections often operate silently in the background, exchanging data between platforms without requiring direct user interaction. 

Lack of visibility across platforms

In many organizations, apps and services are adopted organically, with little to no oversight on how they connect with other tools. Employees or teams may set up integrations with SaaS apps to streamline workflows or automate tasks, often bypassing IT or security teams. 

As a result, these connections may not be visible in centralized management systems, leaving gaps in security monitoring.

Non-standardized integration methods

Every SaaS tool has its own unique way of managing app-to-app connections. Some tools may use API keys, others might rely on OAuth tokens, or even webhooks. The lack of a standardized method for managing these integrations makes it difficult for IT admins to keep track of them uniformly.

Permissions vary by app

The permissions granted by app-to-app connections can vary dramatically from one integration to the next. For instance, an integration between marketing tools and Google Analytics may only require read access, while an integration between a support system and a CRM could grant full admin rights. 

Because these permissions are often granted at the time of integration, it鈥檚 easy for unnecessary or overly broad access to go unnoticed.

Tip:

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Dynamic and evolving connections

App-to-app connections can evolve over time. The permissions granted to one application may change, additional services may be added, or a connection may be inadvertently modified or decommissioned. Without constant oversight, an app-to-app connection that was once safe could evolve into a serious security risk.

App-to-app connections continue to operate after employee departures

In many cases, an employee who configures an app-to-app integration may leave the organization without anyone reviewing or managing the connections they set up. These orphaned integrations still active long after offboarding can grant continued access to critical systems.

Who Let That App In? Common Risks Introduced by App-to-App Connections

The increasing adoption of integrated SaaS applications offers significant benefits in terms of workflow efficiency and productivity. By establishing connections between various digital tools, organizations aim to create streamlined operational ecosystems. 

However, this interconnectedness also presents potential security vulnerabilities and operational challenges that necessitate careful consideration. 

Recognizing and addressing these risks is crucial for maintaining a secure and resilient SaaS environment.

Key Risks Associated with App-to-App Connections:

Unintended Data Exposure
  • Granting overly permissive access during integration can lead to sensitive information being shared with unauthorized applications or third-party services.
  • Errors in data synchronization processes can result in data being incorrectly routed or exposed to unintended destinations.
  • Vulnerabilities within a connected third-party application can be exploited to access data across the entire integrated ecosystem.
Expanded Attack Surface
  • Each connection creates a new potential entry point that malicious actors could exploit.
  • Compromised credentials for one connected application can be used to gain access to other linked tools, enabling lateral movement within the system.
  • Vulnerabilities in the APIs facilitating these connections can be exploited to manipulate data, gain unauthorized access, or disrupt workflows.
  • Security breaches at connected third-party vendors can provide a pathway to attack the organization’s own SaaS environment.
Complexities in Compliance and Governance
  • Disparate data storage locations across different SaaS providers can complicate adherence to data residency and sovereignty regulations.
  • Tracking data lineage and access across interconnected systems can be challenging, hindering auditability and incident response efforts.
  • Ensuring consistent security policies across all connected applications can be difficult, potentially creating security gaps.
Operational Vulnerabilities
  • Updates or changes to one application’s API can disrupt integrations, leading to workflow interruptions and data synchronization issues.
  • Inefficiently designed integrations can introduce performance bottlenecks, negatively impacting user productivity.
  • A strong reliance on interconnected applications can lead to cascading disruptions if one critical tool experiences an outage.

How 探花大神 Spots App-to-App SaaS Risks

App-to-app connections are often overlooked because they operate behind the scenes until something goes wrong. 探花大神 SaaS Management brings these hidden interactions into view by mapping out connections that could introduce risk.

Here鈥檚 how it works:

1. Discovery through strategic connectors

探花大神 detects app-to-app connections by integrating with platforms like Slack, Opsgenie, and Zendesk. These native connectors act as visibility points, helping IT uncover which external applications are connected to the core stack, often without formal approval or oversight.

2. Connection type classification

Not all connections pose the same level of risk. 探花大神 classifies the connection type to help teams better understand each relationship, allowing IT to differentiate between routine automations and high-impact access points.

  • Webhooks: For real-time data exchange
  • Login: Apps granted identity-based access
  • Apps: Direct integrations within apps

3. Contextual metadata for each connection

Each detected connection includes relevant metadata such as connected app name, host platform (e.g., Zendesk), and connection type (e.g., webhook, login). This contextual layer helps IT assess legitimacy, recency, and overall risk.

4. Security insight flagging

App-to-app connections detected by 探花大神 are surfaced through SaaS security insights alongside other insights like shadow accounts, shared accounts, former employee accounts, and risky OAuth permissions.

Each app-to-app connection insight includes detailed context to help IT teams understand the nature of the connection:

  • Source: The platform through which the connection was discovered (e.g., Slack, Opsgenie, Zendesk).
  • Target: The external app the source is connected to (e.g., Figma, Confluence).
  • Type: The method of connection, categorized as login, webhook, or app (e.g., native integrations found inside Slack).

These insights make it easy to map how external apps interact across your environment, even when those connections are created by end users without IT鈥檚 involvement.

Take Control of Your SaaS Integrations

App-to-app connections offer flexibility, but without visibility, they introduce hidden risk. 

探花大神 SaaS Management helps IT teams uncover and understand these connections, providing the context needed to assess exposure and maintain a secure SaaS environment.

to see what鈥檚 connected behind the scenes.

Hatice Ozsahan

Hatice is a Product Marketing Manager at 探花大神, often busy bringing product value to life with compelling messages that resonate across all channels. When not at work, she鈥檚 either battling it out in online video games or getting creative with her art projects.

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