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Excession Labs

Penetration testing and AI red teaming.

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Excession Labs is a security lab. We run authorized penetration tests and AI red teaming for web apps, APIs and AI products.

Vulnerability assessment vs penetration testing: what two scanners found in 27 known flaws

Vulnerability assessment vs penetration testing: what two scanners found in 27 known flaws

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10 min read
How well do prompt injection defenses work? 1,800 trials, 4 defenses, 3 models

How well do prompt injection defenses work? 1,800 trials, 4 defenses, 3 models

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8 min read
ReDoS: catastrophic backtracking in a regex input check

ReDoS: catastrophic backtracking in a regex input check

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8 min read
Race condition vulnerability in a single-use coupon endpoint

Race condition vulnerability in a single-use coupon endpoint

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8 min read
SQL injection example: login bypass and UNION reads on a local API

SQL injection example: login bypass and UNION reads on a local API

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8 min read
IDOR vulnerability: a local example with PUT and DELETE

IDOR vulnerability: a local example with PUT and DELETE

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7 min read
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