CVE-2023-27159 — server-ce
HIGHCVE-2023-27159 is a high-severity (CVSS 7.5) Server-Side Request Forgery (SSRF) vulnerability in appwrite/server-ce. 3 public exploit or proof-of-concept references are indexed, so weaponization risk is real. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.
Appwrite Server-Side Request Forgery vulnerability
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
Exploitation and automatability from CISA’s SSVC triage for CVE-2023-27159.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
appwrite/server-ceReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.
Description
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.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | appwrite/server-ce | all versions | No fix |
Affected Products
appwriteappwriteResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for appwrite/server-ce, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Remediation status
The records we use list no patched version of appwrite/server-ce for CVE-2023-27159. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.
Mitigate without a patch
Restrict outbound requests from the affected component to an allowlist of hosts, block access to link-local and internal address ranges at the network layer, and require authentication on internal services so a forged request cannot reach them unauthenticated.
How to detect CVE-2023-27159
A community-maintained Nuclei template exists for this CVE. You can scan for it directly:
nuclei -id cve-2023-27159 -u https://target- Template
- Appwrite <=1.2.1 - Server-Side Request Forgery
- Severity
- high
- Impact
- This vulnerability can lead to unauthorized access to internal resources, potential data leakage, and further exploitation of the server.
- Remediation
- Upgrade Appwrite to a version higher than 1.2.1 to mitigate the SSRF vulnerability.
Template by ProjectDiscovery nuclei-templates (DhiyaneshDk), MIT licensed. View the full template. Scan only systems you are authorised to test.
Frequently Asked Questions
Is CVE-2023-27159 in your dependencies?
Find it across Packagist, including transitive dependencies.