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CVE-2026-63771

Adminer before 5.4.3 contains a cookie injection vulnerability that allows attackers to manipulate cookie attributes by injecting arbitrary values through the unsanitized X-Forwarded-Prefix HTTP header used in Set-Cookie path attributes. Attackers can exploit a misconfigured reverse proxy to downgrade SameSite protection and enable cross-origin authenticated requests, bypassing cookie security controls.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:7be492d568ad97d16b5a96f494040c7b76eb9acd0ff0973f6175ddc580e6813c
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImp…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:061a9a10559e9f7c3010291a70da710f9e168ed3b9e3a169d10a5e9e3f58dcb2 · sha256:d47cf2c47a5ff3fa… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:061a9a10559e9f7c3010291a70da710f9e168ed3b9e3a169d10a5e9e3f58dcb2 · sha256:d47cf2c47a5ff3fa… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","packageURL":"pkg:composer/vrana/adminer","product":"adminer","repo":"https://github.com/vrana/adminer","vendor":"vrana","versions":[{"lessThan":"5.4.3","status":"affected","version":"0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:061a9a10559e9f7c3010291a70da710f9e168ed3b9e3a169d10a5e9e3f58dcb2 · sha256:d47cf2c47a5ff3fa… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImp…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:061a9a10559e9f7c3010291a70da710f9e168ed3b9e3a169d10a5e9e3f58dcb2 · sha256:d47cf2c47a5ff3fa… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:061a9a10559e9f7c3010291a70da710f9e168ed3b9e3a169d10a5e9e3f58dcb2 · sha256:d47cf2c47a5ff3fa… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-113","description":"Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:061a9a10559e9f7c3010291a70da710f9e168ed3b9e3a169d10a5e9e3f58dcb2 · sha256:d47cf2c47a5ff3fa… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"Researcher Disclosure","tags":["technical-description","exploit","issue-tracking"],"url":"https://github.com/vrana/adminer/issues/1298"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:061a9a10559e9f7c3010291a70da710f9e168ed3b9e3a169d10a5e9e3f58dcb2 · sha256:d47cf2c47a5ff3fa… · /containers/cna/references/0
{"name":"Release Notes","tags":["release-notes"],"url":"https://github.com/vrana/adminer/releases#release-v5.4.3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:061a9a10559e9f7c3010291a70da710f9e168ed3b9e3a169d10a5e9e3f58dcb2 · sha256:d47cf2c47a5ff3fa… · /containers/cna/references/2
{"name":"GitHub Security Advisory (GHSA-c533-9qwm-8w5h)","tags":["vendor-advisory"],"url":"https://github.com/vrana/adminer/security/advisories/GHSA-c533-9qwm-8w5h"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:061a9a10559e9f7c3010291a70da710f9e168ed3b9e3a169d10a5e9e3f58dcb2 · sha256:d47cf2c47a5ff3fa… · /containers/cna/references/1
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/adminer-cookie-injection-via-x-forwarded-prefix-header"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:061a9a10559e9f7c3010291a70da710f9e168ed3b9e3a169d10a5e9e3f58dcb2 · sha256:d47cf2c47a5ff3fa… · /containers/cna/references/3

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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