Grubhub has recently acknowledged a data breach after an unauthorized attacker accessed parts of its internal systems. This revelation coincides with reports from BleepingComputer that the company is dealing with extortion threats regarding stolen data.
In its statement, Grubhub mentioned that they quickly identified and halted the unauthorized activity. They noted, “We are aware that certain unauthorized individuals have downloaded data from some Grubhub systems. We immediately launched an investigation, cut off the activity, and are taking steps to enhance our security measures.” However, Grubhub claims that sensitive information, like financial details and order history, remains unaffected. They refrained from disclosing specific details about when the breach took place or whether customer data was compromised.
What Grubhub Has Confirmed So Far
While specifics are still sparse, Grubhub has confirmed a few important points. They’ve brought in third-party cybersecurity experts and notified law enforcement. Nonetheless, further details are lacking, which is worrying, especially considering Grubhub’s recent security challenges. Just last month, the company was linked to fraudulent emails sent from its own subdomain, promoting cryptocurrency schemes. They stated that they’ve managed to contain that incident and block additional fraudulent communications. It’s unclear if this latest breach is connected to previous issues.
Sources Link This Breach to ShinyHunters Extortion
Multiple reports indicate that the ShinyHunters hacking group is behind the extortion claims. However, the group has not publicly addressed these allegations. Sources suggest that the attackers are demanding Bitcoin payments to avoid disclosing the stolen data, which is believed to include records from a February 2025 breach of Salesforce as well as new information from Zendesk, which Grubhub uses for customer service.
How Stolen Credentials Enabled the Attack
Investigators suspect that this breach may stem from credentials that were taken during an earlier Salesloft Drift attack. In August 2025, unauthorized users accessed sensitive systems by exploiting stolen OAuth tokens from Salesforce. A report by Google’s Threat Intelligence Group—or Mandiant—confirmed that the attackers specifically targeted sensitive credentials, leading to multiple attacks across various platforms.
Why This Violation Still Matters
Even if payment data or order histories weren’t compromised, customer support systems often contain personal information that can aid phishing and identity theft. Moreover, this instance illustrates how past security breaches can perpetuate risks down the line. Credentials that are not updated can serve as gateways for malicious actors.
How to Stay Safe After a Grubhub Data Breach
If you’re a Grubhub user or rely on similar delivery services, taking a few proactive measures can help reduce your vulnerability.
1) Update Your Password and Avoid Reusing It
Firstly, change your Grubhub password right away—and be careful not to use the same password elsewhere. Reusing passwords makes it far easier for attackers to infiltrate other accounts. A password manager could be beneficial here; it helps create and securely store strong, unique passwords.
Additionally, check if your email has been involved in any past breaches. A good password manager can scan to see if your email or passwords belong to any known breaches. If you find a match, update those passwords immediately.
2) Turn on Two-Factor Authentication
Enable two-factor authentication (2FA) where available. This adds an additional security layer—like a code sent to your phone—during sign-in, which can thwart potential hackers even if they have your password.
3) Watch for Phishing Attacks and Use Strong Antivirus Software
Be cautious of messages related to orders, refunds, or support, as attackers often craft these to create urgency based on stolen information. Don’t click links or open attachments unless you’re sure they’re safe. Using robust antivirus software can also help block malicious content.
4) Delete Data from Personal Search Sites
To minimize your digital footprint, you might consider data deletion services. These can help remove personal details from platforms often exploited by criminals. Though no service can promise total removal of data, they actively monitor and remove information from various sites, which can offer peace of mind.
5) Be Skeptical of Encrypted Messages from Trusted Brands
Be wary of any investment offers linked to recognizable companies. Grubhub has had links to fraudulent messages in the past, showing that attackers misuse trusted names. Legitimate businesses don’t pressure customers with promises of quick returns.
6) Monitor Your Grubhub Account and Email Activity
Regularly check your Grubhub account for unfamiliar activity. Watch for unexpected emails related to password resets or order confirmations—these could indicate that stolen data is being tested by attackers.
7) Secure Emails Connected to Your Grubhub Account
Your email is crucial for password resets. Change this password and enable two-factor authentication if you haven’t yet done so. If attackers gain control of your email, they can reset passwords for other accounts.
8) Remain Cautious of Scam Notifications
Data that is compromised may be misused weeks or months down the road. Phishing attempts can occur even after initial reports fade from headlines. Treat any messages claiming to be from Grubhub support or regarding accounts with skepticism.
While these steps won’t undo the damage from the breach, they can help limit potential risks and protect your information more effectively.
