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CVE Record

CVE-2020-7764: Web Cache Poisoning

This affects the package find-my-way before 2.2.5, from 3.0.0 and before 3.0.5. It accepts the Accept-Version' header by default, and if versioned routes are not being used, this could lead to a denial of service. Accept-Version can be used as an unkeyed header in a cache poisoning attack.

MediumCVSS 5.9Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2020-7764 affects the Node.js router package find-my-way. Certain versions accepted the Accept-Version header by default, which could let cache behavior be influenced unexpectedly and cause denial of service when versioned routes are not used.

Executive priority

Treat as a targeted availability risk, not a confirmed breach indicator. Prioritize affected public services behind caches, then internal services. Remediation should be routine but tracked to completion.

Technical view

Affected find-my-way versions before 2.2.5 and 3.0.0 before 3.0.5 may treat Accept-Version as meaningful even without versioned routes. The header can become unkeyed input to intermediary caches, creating web cache poisoning risk with availability impact.

Likely exposure

Exposure is most likely in internet-facing Node.js services using affected find-my-way versions, especially where a proxy or CDN cache does not vary on Accept-Version. Evidence does not identify broader downstream products.

Exploitation context

The source bundle reports potential cache poisoning and denial of service. CVSS marks network access, no privileges, no user interaction, high complexity. KEV is false, and no cited source here confirms active exploitation.

Researcher notes

The key condition is interaction between default Accept-Version handling and cache key behavior. The source bundle does not provide exploit status, affected frameworks, or detailed operational mitigations beyond fixed version ranges and the upstream commit reference.

Mitigation direction

  • Upgrade find-my-way to 2.2.5, 3.0.5, or later as appropriate.
  • Review Snyk and upstream project guidance for exact supported upgrade paths.
  • Check cache configuration for handling of Accept-Version on affected services.
  • Consider bypassing or normalizing irrelevant Accept-Version headers at trusted edges.

Validation and detection

  • Inventory package-lock, yarn.lock, or pnpm-lock for find-my-way affected versions.
  • Identify services exposing affected routers behind shared caches or CDNs.
  • Confirm whether routes use versioning and whether Accept-Version is cache-keyed.
  • Retest after upgrade to confirm the vulnerable version is removed.
Prepared
Confidence
high
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2020-7764 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.9 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
5.9CVSS 3.1MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C2.23.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

5.9Medium
CVSS 3.1 vector shape for CVE-2020-7764Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/afind-my-wayunspecified, 3.0.0, unspecifiedListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.