Single sign-on concentrates trust, so one flaw in the flow can unlock every connected application. We test OAuth 2.0, OpenID Connect and SAML implementations for Cyprus apps against the subtle mistakes that lead to account takeover.
We assess your identity provider and relying parties together — where most real bugs live — covering redirect handling, token validation and assertion parsing.
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
How we run your OAuth, OIDC & SAML SSO Security Testing
- Kick-off & scoping. A short call to agree goals, in-scope assets and rules of engagement, so your oauth, oidc & saml sso security testing is safe, authorised and aimed at your real business risk.
- Mapping & discovery. Before touching anything we map the full attack surface in scope, so nothing exploitable slips through.
- Hands-on testing. Cyprus-based specialists exploit and chain weaknesses manually — the flaws scanners walk straight past — to show genuine impact.
- Reporting. Each issue is verified, CVSS-rated and documented with a step-by-step reproduction and a practical fix your team can apply.
- Free retest. Once you have remediated, we re-test at no extra cost to confirm the attack path is truly closed.
What you receive
- SSO flow security findings
- Account-takeover PoCs where present
- Implementation hardening guidance
- Free retest after remediation
Your deliverables
When your oauth, oidc & saml sso security testing wraps up, you receive a clear, audit-ready report plus a walkthrough call with your team. Inside you will find:
- A concise executive summary that management and the board can act on
- Every technical finding with a reproducible, copy-paste proof of concept
- CVSS v3.1 ratings and plain-language business impact for each issue
- Practical, prioritised remediation your developers can implement straight away
- A free retest and updated finding status once fixes are in place
- A signed attestation letter for clients, auditors, GDPR, NIS2 and ISO 27001
Standards & frameworks
OWASP ASVS
OAuth 2.0 Security BCP (RFC 9700)
OWASP WSTG
What you gain
By the end of your oauth, oidc & saml sso security testing, you will know exactly which weaknesses a real attacker could exploit, what it would cost your business, and the precise order in which to fix them — backed by evidence, not a scanner’s guesswork. Cyprus firms use our findings to close critical gaps, satisfy client and regulator security questionnaires, and demonstrate due diligence for GDPR and NIS2. With a free retest included, you also get documented proof the issues are resolved.
Working with us
Every oauth, oidc & saml sso security testing begins with a short, no-obligation scoping call to understand your goals, environment and constraints, followed by a fixed-price proposal. Most work is delivered remotely, and because we are based in Cyprus we work in your timezone with on-site visits across Limassol, Nicosia and island-wide where it helps. We keep you updated throughout and flag any critical finding immediately rather than waiting for the report. Everything is covered by a signed NDA and safe, non-disruptive testing that protects your production systems. You receive your report, a walkthrough and a complimentary retest once fixes land. Engagements are typically booked one to three weeks ahead, and urgent testing can often be arranged — just email hi@cypruspentest.com.
Why Cyprus businesses choose CyprusPentest
Your oauth, oidc & saml sso security testing is run by senior offensive-security specialists who test the way genuine attackers do — manually, creatively and focused on proving real impact. What sets us apart:
- Based in Cyprus — local, in your timezone, with on-site coverage across Limassol and Nicosia.
- Manual, exploit-led testing that chains vulnerabilities the way an attacker would, well beyond automated scanners.
- Reproducible proof for every finding, with copy-paste steps your team can independently verify.
- Compliance-ready reporting that supports GDPR, NIS2, ISO 27001 and CySEC expectations.
- A free retest so you have documented evidence your fixes actually hold.
- Fixed-price and responsive, with a named point of contact from scoping through to retest.
Explore related services
OAuth, OIDC & SAML SSO Security Testing pairs well with our other Cyprus penetration testing services for fuller coverage. You may also want:
Frequently asked questions
Do you test our IdP or the applications?
Both — most SSO bugs emerge at the boundary between them.
Which providers can you test?
Keycloak, Auth0, Okta, Entra ID, Ping and custom implementations.
Is JWT tampering included?
Yes — algorithm confusion and signature validation are core checks.