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CVE-2025-9611

Microsoft Playwright MCP Server versions prior to 0.0.40 fails to validate the Origin header on incoming connections. This allows an attacker to perform a DNS rebinding attack via a victim’s web browser and send unauthorized requests to a locally running MCP server, resulting in unintended invocation of MCP tool endpoints.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c8a791906dcdef979548036f2e2e9b59f064c87688e4afd55ae2c189f15528f9
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","packageURL":"pkg:github/microsoft/playwright","product":"Playwright","repo":"https://github.com/microsoft/playwright","vendor":"Microsoft","versions":[{"lessThan":"0.0.40","status":"affected","version":"0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:81826cabec443e1293e16783e1beef9e552e50f0e3edd7618cad4bcc8dc33670 · sha256:002cc52b8c4edd32… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":7.2,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"LOW","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:L/SI:L/SA:L","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:81826cabec443e1293e16783e1beef9e552e50f0e3edd7618cad4bcc8dc33670 · sha256:002cc52b8c4edd32… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-749","description":"CWE-749 Exposed Dangerous Method or Function","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:81826cabec443e1293e16783e1beef9e552e50f0e3edd7618cad4bcc8dc33670 · sha256:002cc52b8c4edd32… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"tags":["vendor-advisory"],"url":"https://github.com/JLLeitschuh/security-research/security/advisories/GHSA-8rgw-6xp9-2fg3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:81826cabec443e1293e16783e1beef9e552e50f0e3edd7618cad4bcc8dc33670 · sha256:002cc52b8c4edd32… · /containers/cna/references/0
{"tags":["patch"],"url":"https://github.com/microsoft/playwright/commit/1313fbd"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:81826cabec443e1293e16783e1beef9e552e50f0e3edd7618cad4bcc8dc33670 · sha256:002cc52b8c4edd32… · /containers/cna/references/1
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/microsoft-playwright-mcp-server-dns-rebinding-via-missing-origin-header-validation"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:81826cabec443e1293e16783e1beef9e552e50f0e3edd7618cad4bcc8dc33670 · sha256:002cc52b8c4edd32… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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