HOMEVULNERABILITIESCVE-2021-23357
MEDIUM

CVE-2021-23357

CWE-22Published: March 15, 2021· Updated: Jun 17, 2026

5.3
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2021-23357 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityLow
AvailabilityLow
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Affected Vendors & Products

tyk1 product(s)
tyk
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

ADVISORYhttps://github.com/TykTechnologies/tyk/issues/3390
ADVISORYhttps://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMTYKTECHNOLOGIESTYKGATEWAY-1078516
ADVISORYhttps://github.com/TykTechnologies/tyk/issues/3390
ADVISORYhttps://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMTYKTECHNOLOGIESTYKGATEWAY-1078516

All References (4)

→
https://github.com/TykTechnologies/tyk/issues/3390Exploit · Third Party Advisory
→
https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMTYKTECHNOLOGIESTYKGATEWAY-1078516Third Party Advisory
→
https://github.com/TykTechnologies/tyk/issues/3390Exploit · Third Party Advisory
→
https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMTYKTECHNOLOGIESTYKGATEWAY-1078516Third Party Advisory

Quick Facts

CVE IDCVE-2021-23357
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-22
CISA KEVNo
Affected1 vendor(s)
PublishedMar 15, 2021

Related CVEs (CWE-22)

CVE-2008-6833
10.0
CVE-2008-6604
10.0
CVE-2010-5323
10.0
CVE-2014-3914
10.0
CVE-2011-2653
10.0
CVE-2007-4983
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-23357 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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