CVE-2021-23357
CVE-2021-23357 is a low-severity vulnerability in Tyk with a CVSS 3.x base score of 3.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.
Key facts
- Severity: Low (CVSS 3.x base score 3.3)
- CVSS v2: 4.6
- EPSS exploit prediction: 1% (41st percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-22
- Affected product: Tyk
- Published:
- Last modified:
Description
All versions of package github.com/tyktechnologies/tyk/gateway are vulnerable to Directory Traversal via the handleAddOrUpdateApi function. This function is able to delete arbitrary JSON files on the disk where Tyk is running via the management API. The APIID is provided by the user and this value is then used to create a file on disk. If there is a file found with the same name then it will be deleted and then re-created with the contents of the API creation request.
Frequently asked questions
- What is CVE-2021-23357?
- All versions of package github.com/tyktechnologies/tyk/gateway are vulnerable to Directory Traversal via the handleAddOrUpdateApi function. This function is able to delete arbitrary JSON files on the disk where Tyk is running via the management API. The APIID is provided by the user and this value is then used to create a file on disk. If there is a file found with the same name then it will be deleted and then re-created with the contents of the API creation request.
- How severe is CVE-2021-23357?
- CVE-2021-23357 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2021-23357 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-23357?
- CVE-2021-23357 affects Tyk. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-23357?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-23357 published?
- CVE-2021-23357 was published on 2021-03-15 and last updated on 2026-06-17.
References
- https://github.com/TykTechnologies/tyk/issues/3390
- https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMTYKTECHNOLOGIESTYKGATEWAY-1078516
Affected products (1)
- cpe:2.3:a:tyk:tyk:*:*:*:*:*:*:*:*
More vulnerabilities in Tyk
- CVE-2023-42284 — Critical (CVSS 9.8): Blind SQL injection in api_version parameter in Tyk Gateway version 5.0.3 allows attacker to access and dump the…
- CVE-2023-42283 — Critical (CVSS 9.8): Blind SQL injection in api_id parameter in Tyk Gateway version 5.0.3 allows attacker to access and dump the database…
Other CWE-22 (Path Traversal) vulnerabilities
- CVE-2026-48282 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Limitation of a Pathname to a Restricted…
- CVE-2026-54917 — Critical (CVSS 10.0): SeaweedFS is a distributed storage system for object storage (S3), file systems, and Iceberg tables. Prior to 4.30, the…
- CVE-2026-11429 — Critical (CVSS 10.0): Two endpoints in the Vault Service ScriptsController, shared by Altium Enterprise Server and Altium 365, accept file…
- CVE-2026-34909 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit a Path Traversal vulnerability found in UniFi OS devices to…
- CVE-2026-7411 — Critical (CVSS 10.0): In Eclipse BaSyx Java Server SDK versions prior to 2.0.0-milestone-10, inadequate path normalization in the Submodel…
- CVE-2026-36767 — Critical (CVSS 10.0): A path traversal vulnerability in the /content/images/add endpoint of shopizer v3.2.5 allows attackers write arbitrary…