Single sign-on concentrates trust — and a single flaw in the flow can unlock every connected application. Our SSO security testing targets OAuth 2.0, OpenID Connect and SAML implementations for the subtle mistakes that lead to account takeover: redirect and state handling, token validation and assertion parsing.
We test your identity provider and relying parties together, where most real bugs live.
Our SSO security testing targets OAuth 2.0, OpenID Connect and SAML implementations across your identity provider and relying-party applications. We test redirect_uri and state handling, authorization-code and PKCE flows, JWT and id_token validation, SAML assertion and signature verification, token replay and scope escalation — aligned to the OAuth 2.0 Security Best Current Practice (RFC 9700) and OWASP ASVS. Most real SSO vulnerabilities live at the boundary between the IdP and the apps, which is exactly where we focus.
Single sign-on concentrates trust, so a single flaw in the login flow can unlock every connected application at once. Redirect handling, token validation and SAML assertion parsing are subtle and frequently implemented incorrectly.
SSO security testing targets OAuth 2.0, OpenID Connect and SAML implementations for the exact mistakes that lead to account takeover, assessing your identity provider and relying parties together where most real bugs live.
What we test
redirect_uri & state parameter abuse
Authorization code & PKCE flaws
JWT/id_token validation weaknesses
SAML assertion & signature bypass
Token replay & scope escalation
IdP and relying-party trust gaps
Common vulnerabilities we uncover
redirect_uri and state parameter abuse
Authorization code and PKCE flaws
JWT and id_token validation weaknesses
SAML assertion and signature bypass
Token replay and scope escalation
IdP and relying-party trust gaps
Our methodology
Scoping & rules of engagement. We agree objectives, targets and boundaries for your oauth, oidc & saml sso security testing, so testing is safe, authorized and focused on what matters to your business.
Reconnaissance & mapping. We enumerate the full attack surface in scope, building a complete picture before any exploitation begins.
Manual exploitation. Our senior testers chain vulnerabilities by hand — going far beyond automated scanners — to prove real, demonstrable impact.
Analysis & reporting. Every finding is triaged, risk-rated with CVSS and written up with a copy-paste reproduction and clear remediation.
Remediation support & free retest. We support your team through the fixes and retest the remediated issues to confirm they are genuinely closed.
Tools & techniques
We test SSO flows manually with Burp Suite and protocol-specific tooling, intercepting and manipulating authorization requests, tokens and assertions. We test redirect and state handling, PKCE, JWT and id_token validation, and SAML assertion and signature verification across your identity provider and relying-party apps, mapped to the OAuth 2.0 Security BCP (RFC 9700) and OWASP ASVS.
When you need this engagement
For applications using SSO, social login or federation
When integrating OAuth, OIDC or SAML with third parties
Before rolling out a new identity provider or SSO flow
To prevent account-takeover through SSO flaws
What you receive
SSO flow security findings
Account-takeover PoCs where present
Implementation hardening guidance
Free retest after remediation
What’s included in your report
Every oauth, oidc & saml sso security testing engagement concludes with a comprehensive, board-ready report and a working session to walk your team through it. Your report includes:
An executive summary with overall risk posture for non-technical stakeholders
Detailed technical findings, each with a step-by-step, copy-paste reproduction
CVSS v3.1 severity ratings and business-impact context for every issue
Prioritized, actionable remediation guidance your engineers can apply directly
A complimentary retest to confirm fixes and update finding status
A formal attestation letter for customers, auditors and compliance programs
After your oauth, oidc & saml sso security testing, you will have clear, evidence-based visibility into your real security risk — not a scanner’s guesswork. You will know exactly which weaknesses an attacker could exploit, what the business impact would be, and the precise steps to fix them in priority order. Teams use our findings to close critical gaps, satisfy customer and regulator security requirements, and demonstrate due diligence to their board. With a complimentary retest included, you also get documented proof that the issues are genuinely resolved.
Engagement details & logistics
Every oauth, oidc & saml sso security testing starts with a short, no-obligation scoping call to understand your goals, environment and constraints, followed by a fixed-price proposal and a clear statement of work. Most engagements are delivered fully remotely, with on-site work arranged where it genuinely adds value. Throughout testing we maintain an agreed communication cadence and escalate any critical, high-impact finding to you immediately rather than waiting for the final report. All work is performed under a signed NDA with strict data-handling controls, using safe, non-disruptive techniques and carefully coordinated rules of engagement to protect your production systems. On completion you receive your report and a walkthrough session, followed by a complimentary retest once your fixes are in place. Typical engagements are booked one to three weeks in advance, and urgent or pre-deadline testing can often be accommodated — just ask at hi@agentoffense.com.
Why organizations choose AgentOffense
Our oauth, oidc & saml sso security testing is delivered by senior offensive-security engineers who test the way real attackers do — manually, creatively and with a relentless focus on proving genuine, demonstrable impact. Here is what sets our engagements apart:
Manual, exploit-driven testing that chains vulnerabilities the way a real attacker would, going far beyond what automated scanners can find.
Reproducible proof for every finding, with copy-paste reproduction steps your engineers can follow and independently verify.
Honest severity calibration so you invest in fixing what genuinely matters and avoid wasting effort on false positives and noise.
Clear, business-focused reporting that speaks to engineers and executives alike, tying every issue to real-world impact.
A complimentary retest included, so you get documented proof that your fixes actually close the attack path.
Responsible, collaborative delivery with a named point of contact and secure handling of all data throughout the engagement.
Explore related services
OAuth, OIDC & SAML SSO Security Testing is frequently scoped alongside our other offensive-security services for broader coverage. Explore related engagements that complement it:
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How much does OAuth, OIDC & SAML SSO Security Testing cost?
Every oauth, oidc & saml sso security testing is scoped and priced individually, so you pay for exactly the coverage you need — with no hidden extras. After a short, no-obligation scoping call we send a fixed-price quote, usually within one business day, with clear deliverables, a firm timeline and a complimentary retest included. The price of your oauth, oidc & saml sso security testing depends on the size and complexity of the target and the depth of testing required, so you always know the cost up front before any work begins.
