CVE-2026-47123 (GCVE-0-2026-47123)
Vulnerability from cvelistv5
Published
2026-05-29 19:51
Modified
2026-06-02 01:54
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to 1.8.220, the email processing pipeline in FreeScout's FetchEmails command has two code paths for identifying agent (user) replies based on In-Reply-To / References headers. The notification reply path (notify-{thread_id}-{user_id}-...) extracts thread_id and user_id directly from the Message-ID without HMAC verification. An external attacker who can spoof the From address of a helpdesk agent can inject messages that FreeScout processes as legitimate agent replies — which are then automatically forwarded to customers via the legitimate SMTP server. This vulnerability is fixed in 1.8.220.
References
| URL | Tags | |
|---|---|---|
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| freescout-help-desk | freescout |
Version: < 1.8.220 |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-47123",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-02T01:54:19.123127Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-06-02T01:54:46.486Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://vincent.vulcoord.net/score/?state=Not+Scored\u0026year=2026\u0026year=2025\u0026assigned_to=a165dae3-480e-4f7d-bbb8-9b1d78115b69\u0026cve=CVE-2026-47123\u0026analyze=1"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "freescout",
"vendor": "freescout-help-desk",
"versions": [
{
"status": "affected",
"version": "\u003c 1.8.220"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "FreeScout is a free help desk and shared inbox built with PHP\u0027s Laravel framework. Prior to 1.8.220, the email processing pipeline in FreeScout\u0027s FetchEmails command has two code paths for identifying agent (user) replies based on In-Reply-To / References headers. The notification reply path (notify-{thread_id}-{user_id}-...) extracts thread_id and user_id directly from the Message-ID without HMAC verification. An external attacker who can spoof the From address of a helpdesk agent can inject messages that FreeScout processes as legitimate agent replies \u2014 which are then automatically forwarded to customers via the legitimate SMTP server. This vulnerability is fixed in 1.8.220."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "LOW",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-290",
"description": "CWE-290: Authentication Bypass by Spoofing",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-345",
"description": "CWE-345: Insufficient Verification of Data Authenticity",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-29T19:51:41.383Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6r38-6mcf-2ww3",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6r38-6mcf-2ww3"
},
{
"name": "https://github.com/freescout-help-desk/freescout/commit/d902f19038213c6a376947d269b00440908e88a0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/freescout-help-desk/freescout/commit/d902f19038213c6a376947d269b00440908e88a0"
}
],
"source": {
"advisory": "GHSA-6r38-6mcf-2ww3",
"discovery": "UNKNOWN"
},
"title": "FreeScout: Agent Impersonation via Missing HMAC Verification on Notification Reply Message-ID Path"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-47123",
"datePublished": "2026-05-29T19:51:41.383Z",
"dateReserved": "2026-05-18T19:50:18.694Z",
"dateUpdated": "2026-06-02T01:54:46.486Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-47123\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-06-02T01:54:19.123127Z\"}}}], \"references\": [{\"url\": \"https://vincent.vulcoord.net/score/?state=Not+Scored\u0026year=2026\u0026year=2025\u0026assigned_to=a165dae3-480e-4f7d-bbb8-9b1d78115b69\u0026cve=CVE-2026-47123\u0026analyze=1\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-06-02T01:54:40.887Z\"}}], \"cna\": {\"title\": \"FreeScout: Agent Impersonation via Missing HMAC Verification on Notification Reply Message-ID Path\", \"source\": {\"advisory\": \"GHSA-6r38-6mcf-2ww3\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"LOW\"}}], \"affected\": [{\"vendor\": \"freescout-help-desk\", \"product\": \"freescout\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 1.8.220\"}]}], \"references\": [{\"url\": \"https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6r38-6mcf-2ww3\", \"name\": \"https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6r38-6mcf-2ww3\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/freescout-help-desk/freescout/commit/d902f19038213c6a376947d269b00440908e88a0\", \"name\": \"https://github.com/freescout-help-desk/freescout/commit/d902f19038213c6a376947d269b00440908e88a0\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"FreeScout is a free help desk and shared inbox built with PHP\u0027s Laravel framework. Prior to 1.8.220, the email processing pipeline in FreeScout\u0027s FetchEmails command has two code paths for identifying agent (user) replies based on In-Reply-To / References headers. The notification reply path (notify-{thread_id}-{user_id}-...) extracts thread_id and user_id directly from the Message-ID without HMAC verification. An external attacker who can spoof the From address of a helpdesk agent can inject messages that FreeScout processes as legitimate agent replies \\u2014 which are then automatically forwarded to customers via the legitimate SMTP server. This vulnerability is fixed in 1.8.220.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-290\", \"description\": \"CWE-290: Authentication Bypass by Spoofing\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-345\", \"description\": \"CWE-345: Insufficient Verification of Data Authenticity\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-05-29T19:51:41.383Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-47123\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-02T01:54:46.486Z\", \"dateReserved\": \"2026-05-18T19:50:18.694Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-05-29T19:51:41.383Z\", \"assignerShortName\": \"GitHub_M\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…