CVE Explorer
CVE-2026-53591
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.223, an unauthenticated attacker can inject messages into any existing support conversation by sending a single email to the helpdesk's public address with a crafted `In-Reply-To` header. No credentials, tokens, or prior access are required. The injected message is rendered in the agent UI as a legitimate customer reply, the conversation is automatically reopened, and the `last_reply_from` fie
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"freescout","vendor":"freescout-help-desk","versions":[{"status":"affected","version":"< 1.8.223"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:c67409bdd64bc6be0bda1c81d4de24258a64a2ddc2321b1561c1bcd566590984 · sha256:157a76921a9a08a5… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":8.6,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:c67409bdd64bc6be0bda1c81d4de24258a64a2ddc2321b1561c1bcd566590984 · sha256:157a76921a9a08a5… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-287","description":"CWE-287: Improper Authentication","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:c67409bdd64bc6be0bda1c81d4de24258a64a2ddc2321b1561c1bcd566590984 · sha256:157a76921a9a08a5… · /containers/cna/problemTypes/0/descriptions/0
Source references
2 source assertions{"name":"https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-8vm3-wwq4-ggfx","tags":["x_refsource_CONFIRM"],"url":"https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-8vm3-wwq4-ggfx"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:c67409bdd64bc6be0bda1c81d4de24258a64a2ddc2321b1561c1bcd566590984 · sha256:157a76921a9a08a5… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-8vm3-wwq4-ggfx"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:c67409bdd64bc6be0bda1c81d4de24258a64a2ddc2321b1561c1bcd566590984 · sha256:157a76921a9a08a5… · /containers/adp/0/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.