CVE-2023-27159
Published: 31 March 2023
Summary
CVE-2023-27159 is a high-severity SSRF (CWE-918) vulnerability in Appwrite Appwrite. Its CVSS base score is 7.5 (High).
Operationally, ranked in the top 1.0% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
Appwrite versions up to v1.2.1 contain a Server-Side Request Forgery vulnerability in the /v1/avatars/favicon component. The flaw is tracked as CVE-2023-27159 with a CVSS 3.1 score of 7.5 and is classified under CWE-918. It permits an unauthenticated remote attacker to supply a crafted GET request that causes the server to fetch arbitrary URLs.
An attacker can leverage the issue to reach internal network resources and retrieve sensitive information that would otherwise be inaccessible from outside the application. Because the attack requires no credentials and can be performed over the network with low complexity, any party able to reach the Appwrite instance can trigger the SSRF.
Public references include the Appwrite GitHub repository, technical write-ups on notes.sjtu.edu.cn, and proof-of-concept gists that demonstrate the request format. No official mitigation statements or patch details are provided in the available references.
The associated EPSS score currently stands at 0.7697 with a recorded peak of 0.8469, indicating sustained exploitation interest after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-1042
Vulnerability details
Appwrite up to v1.2.1 was discovered to contain a Server-Side Request Forgery (SSRF) via the component /v1/avatars/favicon. This vulnerability allows attackers to access network resources and sensitive information via a crafted GET request.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
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.
Penetration testing attempts server-side requests to internal resources, identifying SSRF weaknesses for remediation.
Outbound connections to external resources can be monitored and limited at the boundary, reducing SSRF impact.
Validates server-side URLs and resource references to block SSRF attempts.
Detects server-side request forgery through monitoring of unexpected outbound connections.