CVE Explorer

CVE-2026-28289

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. A patch bypass vulnerability for CVE-2026-27636 in FreeScout 1.8.206 and earlier allows any authenticated user with file upload permissions to achieve Remote Code Execution (RCE) on the server by uploading a malicious .htaccess file using a zero-width space character prefix to bypass the security check. The vulnerability exists in the sanitizeUploadedFileName() function in app/Http/Helper.php. The function contain

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:687b4b56cd931b32631ee0347c87acf4c9c6c8216322bbc2de71103bb4f18c92

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"freescout","vendor":"freescout-help-desk","versions":[{"status":"affected","version":"< 1.8.207"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:f51f5443448542534cb9a7aab29a975b7c34494d7dab14bf2d32bbfead99915f · sha256:2e6f65436c37b58c… · /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":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/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:f51f5443448542534cb9a7aab29a975b7c34494d7dab14bf2d32bbfead99915f · sha256:2e6f65436c37b58c… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-434","description":"CWE-434: Unrestricted Upload of File with Dangerous Type","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:f51f5443448542534cb9a7aab29a975b7c34494d7dab14bf2d32bbfead99915f · sha256:2e6f65436c37b58c… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions

{"name":"https://github.com/freescout-help-desk/freescout/commit/f7bc16c56a6b13c06da52ad51fd666546b40818f","tags":["x_refsource_MISC"],"url":"https://github.com/freescout-help-desk/freescout/commit/f7bc16c56a6b13c06da52ad51fd666546b40818f"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:f51f5443448542534cb9a7aab29a975b7c34494d7dab14bf2d32bbfead99915f · sha256:2e6f65436c37b58c… · /containers/cna/references/1

{"name":"https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-5gpc-65p8-ffwp","tags":["x_refsource_CONFIRM"],"url":"https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-5gpc-65p8-ffwp"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:f51f5443448542534cb9a7aab29a975b7c34494d7dab14bf2d32bbfead99915f · sha256:2e6f65436c37b58c… · /containers/cna/references/0

{"url":"https://www.ox.security/blog/freescout-rce-cve-2026-28289/"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:f51f5443448542534cb9a7aab29a975b7c34494d7dab14bf2d32bbfead99915f · sha256:2e6f65436c37b58c… · /containers/adp/1/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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