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CVE-2026-27591

Winter is a free, open-source content management system (CMS) based on the Laravel PHP framework. Prior to 1.0.477, 1.1.12, and 1.2.12, Winter CMS allowed authenticated backend users to escalate their accounts level of access to the system by modifying the roles / permissions assigned to their account through specially crafted requests to the backend while logged in. To actively exploit this security issue, an attacker would need access to the Backend with a user account with any level of access
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e40e517d46e192967128ca4fba5dc5361272881014717388b382047357829b52
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 3 assertions

{"cweId":"CWE-639","description":"CWE-639: Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:cc49a21d88f066eea279d0846f7a376cd9dd86fb51f06ceb0d8f9fee44ae60e6 · sha256:098d5ec40b24174b… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-284","description":"CWE-284: Improper Access Control","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:cc49a21d88f066eea279d0846f7a376cd9dd86fb51f06ceb0d8f9fee44ae60e6 · sha256:098d5ec40b24174b… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-915","description":"CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:cc49a21d88f066eea279d0846f7a376cd9dd86fb51f06ceb0d8f9fee44ae60e6 · sha256:098d5ec40b24174b… · /containers/cna/problemTypes/2/descriptions/0

Affected products and versions

1 source assertion
{"product":"winter","vendor":"wintercms","versions":[{"status":"affected","version":">= 1.2.0, < 1.2.12"},{"status":"affected","version":">= 1.1.0, < 1.1.12"},{"status":"affected","version":"< 1.0.477"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cc49a21d88f066eea279d0846f7a376cd9dd86fb51f06ceb0d8f9fee44ae60e6 · sha256:098d5ec40b24174b… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":10,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:cc49a21d88f066eea279d0846f7a376cd9dd86fb51f06ceb0d8f9fee44ae60e6 · sha256:098d5ec40b24174b… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

3 source assertions
{"cweId":"CWE-639","description":"CWE-639: Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:cc49a21d88f066eea279d0846f7a376cd9dd86fb51f06ceb0d8f9fee44ae60e6 · sha256:098d5ec40b24174b… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-284","description":"CWE-284: Improper Access Control","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:cc49a21d88f066eea279d0846f7a376cd9dd86fb51f06ceb0d8f9fee44ae60e6 · sha256:098d5ec40b24174b… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-915","description":"CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:cc49a21d88f066eea279d0846f7a376cd9dd86fb51f06ceb0d8f9fee44ae60e6 · sha256:098d5ec40b24174b… · /containers/cna/problemTypes/2/descriptions/0

Source references

4 source assertions
{"name":"https://github.com/wintercms/winter/security/advisories/GHSA-pgpf-m8m4-6cg6","tags":["x_refsource_CONFIRM"],"url":"https://github.com/wintercms/winter/security/advisories/GHSA-pgpf-m8m4-6cg6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cc49a21d88f066eea279d0846f7a376cd9dd86fb51f06ceb0d8f9fee44ae60e6 · sha256:098d5ec40b24174b… · /containers/cna/references/0
{"name":"https://wintercms.com/releases/v1.0.477","tags":["x_refsource_MISC"],"url":"https://wintercms.com/releases/v1.0.477"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cc49a21d88f066eea279d0846f7a376cd9dd86fb51f06ceb0d8f9fee44ae60e6 · sha256:098d5ec40b24174b… · /containers/cna/references/1
{"name":"https://wintercms.com/releases/v1.1.12","tags":["x_refsource_MISC"],"url":"https://wintercms.com/releases/v1.1.12"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cc49a21d88f066eea279d0846f7a376cd9dd86fb51f06ceb0d8f9fee44ae60e6 · sha256:098d5ec40b24174b… · /containers/cna/references/2
{"name":"https://wintercms.com/releases/v1.2.12","tags":["x_refsource_MISC"],"url":"https://wintercms.com/releases/v1.2.12"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cc49a21d88f066eea279d0846f7a376cd9dd86fb51f06ceb0d8f9fee44ae60e6 · sha256:098d5ec40b24174b… · /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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