Digital marketing: cyber security risk

Last updated: August 2025

For the digital marketing sector, it’s no longer a question of ‘if’ a security breach or cyber attack will happen, but ‘when’. This is because the very nature of digital marketing involves handling vast amounts of valuable data and relying on a complex web of third-party tools, making the industry a prime target for cybercriminals.

A cyber event or attack is any malicious or accidental event affecting IT systems, data or technology. For digital marketing companies, the consequences of such an event can be devastating and unrecoverable, leading to a loss of operational ability, reputational damage, financial penalties and a failure to win new business.

Why digital marketing companies are prime targets

Digital marketing agencies are particularly vulnerable to cyber threats for several key reasons:

• Digital marketers handle vast quantities of data, from website traffic analytics to campaign performance metrics. While much of this is general data, a breach of these systems can still disrupt operations and provide a foothold for further attacks.
• Marketers often hold personally identifiable information (PII) and sensitive personal data on behalf of clients and their customers. This data, including names, email addresses, phone numbers and payment details, is highly valuable to cybercriminals and has a direct financial value on the dark web.
• Marketing campaigns and operations rely on a complex ecosystem of third-party tools and platforms, CRMs, analytics software and email marketing services. Each of these integrations represents a potential entry point for an attacker if not properly secured.
• Websites, social media accounts and online ad campaigns are all public-facing platforms. Attackers can exploit vulnerabilities in these systems, hijack accounts or use them to distribute malware, which can directly impact both the agency and its clients.

The cost of a breach

A data breach or cyber-attack can lead to significant financial penalties, particularly under the UK General Data Protection Regulation (GDPR) and the Privacy and Electronic Communications Regulations (PECR). The Information Commissioner’s Office (ICO) has the power to issue substantial fines for infringements.

• Under the UK GDPR, serious data protection infringements can result in fines of up to £17.5 million or 4% of a company’s total annual worldwide turnover, whichever is greater.
• PECR breaches, often related to illegal direct marketing (for example, nuisance calls, emails and texts), can lead to fines of up to £500,000. The Information Commissioner’s Office (ICO) has issued millions of pounds in fines to companies in the marketing sector for violations of these regulations.

Surviving an event or an attack

With any risk, you have three decisions to make: accept, mitigate or transfer. Mitigation involves reducing your risk to prevent an attack. The key to surviving a cyber event is to prepare for it, and it’s simpler than you might think.

First, creating a Business Continuity Plan (BCP) and a Disaster Recovery Plan (DRP) ensures you’re ready to act if an attack occurs. Second, prevention is the best defence. Completing risk assessments and action plans, often through certifications like IASME Cyber Essentials and Cyber Assurance, is the best way to identify and mitigate risks.

Education is also vital. With email-based attacks dominating the threat landscape, your employees are one of your strongest defences. Here are some key recommendations that we make to digital marketing companies to improve their cyber resilience:

Access management

• Implement Multi-Factor Authentication (MFA) for all accounts and platforms
• Adhere to the principle of least privilege, limiting user access to only what’s necessary for their role
• Ensure timely access revocation for employees who leave the company
• Do not use shared logins or credentials

Tools & platforms

• Conduct a quarterly review of all third-party integrations (e.g., CRMs, analytics, email tools)
• Keep all plugins, extensions, and CMS platforms (like WordPress) up to date
• Use only reputable tools with a strong track record of security and compliance
• Run a plugin audit to remove any unused or legacy tools that could be a security risk

Website & content security

• Install a Web Application Firewall (WAF) and a malware scanner
• Ensure your website uses HTTPS with a valid SSL certificate
• Sanitise forms to prevent injection attacks (e.g., on contact or lead generation forms)
• Regularly back up your site and test restore capabilities
• Use tools to prevent form spam and bots

Email & ad security

• Configure SPF, DKIM, and DMARC to prevent email spoofing and phishing attacks
• Use secure, verified sender domains in all email campaigns
• Monitor for phishing attempts using your brand name
• Set up alerts for unusual ad activity (e.g., sudden spikes in spend or strange geographic locations)
• Use click fraud protection tools on your PPC platforms

Policy & training

• Conduct regular cybersecurity training for all employees, focusing on topics like phishing, safe tool use and data handling
• Document and share clear security incident reporting procedures
• Create a robust password policy that encourages strong passwords, regular rotation and the use of password managers
• Foster a security-first culture in all campaign planning and execution

Increasing numbers of our customers are contacting us as cyber and information security certifications are becoming expected, not just for public sector or large tender opportunities. We have designed bespoke packages through our new service, BRaaS, to allow all organisations to achieve assurances that their IT systems, data and technology are secure.

BRaaS provides a flexible, customisable package that combines core and supplementary services to create a complete solution for prevention, detection and recovery. It’s a unique approach that ensures your business is secure, connected and prepared for threats, all for a predictable, fixed monthly cost, making it accessible for digital marketing startups and SMEs.