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Moving our online store to the cloud, what are the most common real-world cloud security vulnerabilities?

OOkyanusMember
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regional distributor
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#1

We run an e-commerce site based in Valencia selling handmade leather shoes and bags. We turn over about 450k euros a year and have been hosted on a physical server in a local data center for the last six years. Due to increasing traffic spikes and maintenance headaches, we decided to migrate our entire database, product images, and payment infrastructure to the public cloud next month. We've set aside an infrastructure budget of roughly 1,200 euros per month for this migration.

Our tech team is putting together the migration plan, but rather than theoretical advice, I want to know real-world cloud security examples that actually cause serious damage during a migration from on-prem to the cloud. On paper, everything looks encrypted and secure, but in practice, where do the biggest leaks actually happen? What should we watch out for regarding database leaks, misconfigured permissions, or exposed storage buckets?

İİsmail T***MemberCommunity member
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Most Helpful#2

Short answer: In practice, the most common cloud security vulnerabilities don't stem from the cloud provider's core systems, but from misconfigured storage buckets and overly permissive API keys. Since traditional network perimeters shift to identity and access management (IAM) in the cloud, a single permissions error can expose all your data to the public internet.

During migration, you should pay special attention to three concrete scenarios: 1) Publicly accessible object storage buckets. If customer invoices or backup files are placed in the root directory of a bucket created for product photos, all personal data can end up indexed via a single URL. 2) Hardcoding admin keys into source code or dev environment configurations. If these keys leak, an attacker can spin up rogue VMs within minutes and rack up massive bills. 3) Leaving default management ports and database ports exposed directly to the internet.

As a precaution, enforce the principle of least privilege from day one; no service account should ever have more read or write access than it strictly requires. Never expose the database directly to the internet; it should only be accessible from your internal network via the application server. Additionally, enable your cloud provider's automated security scanners, configure anomaly alerts, and enforce centralized logging. Keep your backups in a separate, delete-protected account that is completely isolated from your primary management account.

PPolat G***Member
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#3

The most critical technical mistake is leaving the instance metadata service on version 1. If you have a plugin with an SSRF vulnerability, an attacker can directly query that local address and steal temporary credentials assigned to the instance. Enforce IMDSv2 and lock down role-based permissions.

EEsra A***Member
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#4

While migrating a similar-sized retail site, we accidentally left the staging database port open for 2 days. Within 48 hours, automated brute-force attempts hit us from 14,000 distinct IP addresses. If your budget is 1,200 euros, allocate at least 150 euros of that to centralized logging and real-time alerting tools.

VVildan Ş***MemberCommunity member
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#5

Don't buy into the cloud provider's 'everything is secure' marketing. Under the shared responsibility model, they own the infrastructure, but OS patches, open ports, and access rules are entirely on you. If a breach happens, the financial hit and the legal penalties land squarely on your company.

NNazlı T***MemberCommunity member
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#6

Make sure to complete these three checks before launch day: 1) Enable 'block public access' across all storage buckets. 2) Place your instances in a private subnet and only allow external traffic through a load balancer. 3) Require hardware- or app-based multi-factor authentication for every single employee accessing the management console, without exception.

RRecep S***Member
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#7

people mostly get burned by devs pushing config files to github repos. if the api key is in the code you're toast they'll set up a crypto miner on your instance withni two hours.

İİsmail K***Member
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#8

This happened to one of our wholesalers in Barcelona; they dumped a legacy daily database backup into a public storage bucket. Nobody noticed for two months until a search engine indexed the backup file, exposing customer tax IDs and order histories. They received a severe warning and fine from the data protection authority.

VVolkan Ö***Expert
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#9

When migrating your payment infrastructure, are you storing card details directly on your servers or using a secure tokenization system provided by your payment gateway? If card data touches your servers at all, your cloud security and compliance standards need to be vastly stricter.

DDoruk Y***Member
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#10

Yes, that's exactly how it is with cloud security examples. Start with a small trial; don't commit to everything at once.

Taking notes for two weeks yields better results than a six-month estimate. Correct me if I'm wrong.

JJülide A***MemberCommunity member
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#11

I felt relieved reading this answer, so it's not just me. Solutions that work at a small scale collapse when you grow; I learned this late.

This is my opinion, I'm not claiming it's absolute truth.

OOnurExpert
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#12

Thanks for writing this, that's the right way. Trying to do this alone is the most expensive way.

Good luck with that.

HHalil K***Member
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Doki · Interface design · 2026

#13

We need to make a distinction here. Everyone rushing into cloud security examples gets stuck at the same point.

Hope this helps.

İİlker G***Member
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#14

I feel the same way. An untested backup is not a backup.

Just because everyone does it doesn't mean it's right. Good luck with that.

AAleyna S***Member
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#15

Good call starting this thread. If the notification path is long, notifications don't arrive; missing notifications mean delayed incident detection.

This is my opinion, I'm not claiming it's absolute truth.

OOnur Ç***MemberCommunity member
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#16

I'm a small business, let me explain from my side. Just because everyone does it doesn't mean it's right.

If I were you, I'd go this route.

PPerihan M***MemberCommunity member
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#17

You're right.

AAslı B***Expert
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Doki · Infrastructure migration · 2023

#18

the cheap-looking path usually ends up costing more later then honestly hasty decisions become decissions you have to fix six months later.

that's all, sorry if I went on too long.

BBurcu N***Member
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#19

Saved. anyway hasty decisions become decisions you have to fix six months later.

Good luck with that.

OOkan Y***ExpertCommunity member
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#20

We got stuck at the same point for a while. Taking measures without an inventory leaves doors you haven't seen open.

This is my opinion, I'm not claiming it's absolute truth.

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