CVE Explorer

CVE-2026-40872

mailcow: dockerized is an open source groupware/email suite based on docker. In versions prior to 2026-03b, the admin dashboard's Autodiscover logs render the EMailAddress value (logged as the "user" field) without HTML escaping. By submitting an unauthenticated Autodiscover request with a crafted EMailAddress containing HTML/JS, the payload is stored in Redis and executed when an admin views the Autodiscover logs. Version 2026-03b fixes the vulnerability.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:1be6ebc9f82b8bc166f4b090e386b8c2759fae6d5d7cffa668395fa8514cfcdc

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:0518b73541abde3b1f933edbe5a96d92cc8d428a1d85f6547453206efb2c98ec · sha256:0f1ec363890e7eee… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-80","description":"CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:0518b73541abde3b1f933edbe5a96d92cc8d428a1d85f6547453206efb2c98ec · sha256:0f1ec363890e7eee… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion

{"product":"mailcow-dockerized","vendor":"mailcow","versions":[{"status":"affected","version":"< 2026-03b"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:0518b73541abde3b1f933edbe5a96d92cc8d428a1d85f6547453206efb2c98ec · sha256:0f1ec363890e7eee… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.3,"baseSeverity":"CRITICAL","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:0518b73541abde3b1f933edbe5a96d92cc8d428a1d85f6547453206efb2c98ec · sha256:0f1ec363890e7eee… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions

{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:0518b73541abde3b1f933edbe5a96d92cc8d428a1d85f6547453206efb2c98ec · sha256:0f1ec363890e7eee… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-80","description":"CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:0518b73541abde3b1f933edbe5a96d92cc8d428a1d85f6547453206efb2c98ec · sha256:0f1ec363890e7eee… · /containers/cna/problemTypes/1/descriptions/0

Source references

2 source assertions

{"tags":["exploit"],"url":"https://github.com/mailcow/mailcow-dockerized/security/advisories/GHSA-f9xf-vc72-rcgm"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:0518b73541abde3b1f933edbe5a96d92cc8d428a1d85f6547453206efb2c98ec · sha256:0f1ec363890e7eee… · /containers/adp/0/references/0

{"name":"https://github.com/mailcow/mailcow-dockerized/security/advisories/GHSA-f9xf-vc72-rcgm","tags":["x_refsource_CONFIRM"],"url":"https://github.com/mailcow/mailcow-dockerized/security/advisories/GHSA-f9xf-vc72-rcgm"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:0518b73541abde3b1f933edbe5a96d92cc8d428a1d85f6547453206efb2c98ec · sha256:0f1ec363890e7eee… · /containers/cna/references/0

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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