Cyber Resilience

CVE-2023-3568

Open Redirect in Fossbilling ≤ 0.5.4

Open Redirect
Published
10 July 2023
Modified
21 November 2024
CVSS Score v3.1 6.3
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
EPSS Score 0.0043 36th percentile
Risk Priority 49 floored blend · peak EPSS

Summary

CVE-2023-3568 is a medium-severity Open Redirect (CWE-601) vulnerability in Fossbilling Fossbilling. Its CVSS base score is 6.3 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Phishing (T1566); ranked at the 36th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A01:2025 Broken Access Control

EU & UK References

Vulnerability Data

Open Redirect in GitHub repository alextselegidis/easyappointments prior to 1.5.0.

CWE(s)
CWE-601

Related Threats

MITRE ATT&CK Enterprise Techniques

T1566 Phishing Initial Access
Adversaries may send phishing messages to gain access to victim systems.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-3493Same product: Fossbilling Fossbilling
CVE-2023-3227Same product: Fossbilling Fossbilling
CVE-2023-3490Same product: Fossbilling Fossbilling
CVE-2023-3491Same product: Fossbilling Fossbilling
CVE-2023-3230Same product: Fossbilling Fossbilling
CVE-2023-3228Same product: Fossbilling Fossbilling
CVE-2023-3394Same product: Fossbilling Fossbilling
CVE-2023-3229Same product: Fossbilling Fossbilling
CVE-2023-3393Same product: Fossbilling Fossbilling
CVE-2023-4005Same product: Fossbilling Fossbilling

Affected Assets

fossbilling
fossbilling
≤ 0.5.4

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V3.7.2

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

AT-2 Literacy Training and Awareness
addresses: CWE-601

Security awareness includes verifying URLs and avoiding untrusted redirects that lead to malicious sites.

SI-10 Information Input Validation
addresses: CWE-601

Validates redirect targets and URLs to ensure they conform to allowed destinations.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require input validation and untrusted-redirect controls that prevent CWE-601.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.23 Web filtering partial match
mitigates

Preventing access to attacker-controlled or malicious sites stops users from being redirected to untrusted locations via open-redirect or phishing links.

References