Three Security Bugs Keep Reappearing in AI-Built SaaS

Speed-to-ship keeps surfacing the same three failures: tenant isolation, unsigned webhooks, and leaked secrets. This is basic hygiene, but missing any one can turn a weekend launch into data loss, fake payments, or full takeover.

[ KEY POINTS ]

Broken tenant isolation still shows up via simple ID swaps like /api/orders/123 to 124; two test accounts can expose cross-customer data fast.
Webhook endpoints that skip Stripe signature checks accept forged payment, refund, and event calls; nothing looks broken until money or state goes wrong.
Secrets keep leaking through client bundles, public repos, or stray .env files; bots scan continuously, so exposed keys can become a bill spike within minutes.
Three recent cases chained IDOR into admin takeover, including a reviewed team product; fast shipping does not compensate for missing access control.
A full pentest may be overkill at $2k MRR, but these three checks are cheap enough to verify in a weekend before they become existential.

Originalwww.reddit.com/r/microsaas/comments/1t3hy7q/ive_been_doing_pentests_on_a_bunch_of_aibuilt/Read original →

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Three Security Bugs Keep Reappearing in AI-Built SaaS

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Customer-Driven Workspace Feature Converts a $216 Annual Sale

Puzzle site monetization stalls despite 2k-5k daily users

$8.2k Agency Video Lost to a £20 Five-Minute Product Demo