Vulnerabilites related to greenshot - greenshot
CVE-2025-59050 (GCVE-0-2025-59050)
Vulnerability from cvelistv5
Published
2025-09-16 16:23
Modified
2025-09-16 18:26
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-502 - Deserialization of Untrusted Data
Summary
Greenshot is an open source Windows screenshot utility. Greenshot 1.3.300 and earlier deserializes attacker-controlled data received in a WM_COPYDATA message using BinaryFormatter.Deserialize without prior validation or authentication, allowing a local process at the same integrity level to trigger arbitrary code execution inside the Greenshot process. The vulnerable logic resides in a WinForms WndProc handler for WM_COPYDATA (message 74) that copies the supplied bytes into a MemoryStream and invokes BinaryFormatter.Deserialize, and only afterward checks whether the specified channel is authorized. Because the authorization check occurs after deserialization, any gadget chain embedded in the serialized payload executes regardless of channel membership. A local attacker who can send WM_COPYDATA to the Greenshot main window can achieve in-process code execution, which may aid evasion of application control policies by running payloads within the trusted, signed Greenshot.exe process. This issue is fixed in version 1.3.301. No known workarounds exist.
References
| ▼ | URL | Tags |
|---|---|---|
| https://github.com/greenshot/greenshot/security/advisories/GHSA-8f7f-x7ww-xx5w | x_refsource_CONFIRM | |
| https://github.com/greenshot/greenshot/commit/f5a29a2ed3b0eb49231c0f4618300f488cf1b04d | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-59050",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-09-16T17:29:53.576216Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-09-16T18:26:45.315Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/greenshot/greenshot/security/advisories/GHSA-8f7f-x7ww-xx5w"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "greenshot",
"vendor": "greenshot",
"versions": [
{
"status": "affected",
"version": "\u003c 1.3.301"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Greenshot is an open source Windows screenshot utility. Greenshot 1.3.300 and earlier deserializes attacker-controlled data received in a WM_COPYDATA message using BinaryFormatter.Deserialize without prior validation or authentication, allowing a local process at the same integrity level to trigger arbitrary code execution inside the Greenshot process. The vulnerable logic resides in a WinForms WndProc handler for WM_COPYDATA (message 74) that copies the supplied bytes into a MemoryStream and invokes BinaryFormatter.Deserialize, and only afterward checks whether the specified channel is authorized. Because the authorization check occurs after deserialization, any gadget chain embedded in the serialized payload executes regardless of channel membership. A local attacker who can send WM_COPYDATA to the Greenshot main window can achieve in-process code execution, which may aid evasion of application control policies by running payloads within the trusted, signed Greenshot.exe process. This issue is fixed in version 1.3.301. No known workarounds exist."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 8.4,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-502",
"description": "CWE-502: Deserialization of Untrusted Data",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-09-16T16:23:37.866Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/greenshot/greenshot/security/advisories/GHSA-8f7f-x7ww-xx5w",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/greenshot/greenshot/security/advisories/GHSA-8f7f-x7ww-xx5w"
},
{
"name": "https://github.com/greenshot/greenshot/commit/f5a29a2ed3b0eb49231c0f4618300f488cf1b04d",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/greenshot/greenshot/commit/f5a29a2ed3b0eb49231c0f4618300f488cf1b04d"
}
],
"source": {
"advisory": "GHSA-8f7f-x7ww-xx5w",
"discovery": "UNKNOWN"
},
"title": "Greenshot \u2014 Insecure .NET deserialization via WM_COPYDATA enables local code execution"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2025-59050",
"datePublished": "2025-09-16T16:23:37.866Z",
"dateReserved": "2025-09-08T16:19:26.172Z",
"dateUpdated": "2025-09-16T18:26:45.315Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
CVE-2023-34634 (GCVE-0-2023-34634)
Vulnerability from cvelistv5
Published
2023-08-01 00:00
Modified
2024-10-23 20:45
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- n/a
Summary
Greenshot 1.2.10 and below allows arbitrary code execution because .NET content is insecurely deserialized when a .greenshot file is opened.
References
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-02T16:17:04.194Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_transferred"
],
"url": "https://greenshot.atlassian.net/browse/BUG-3061"
},
{
"tags": [
"x_transferred"
],
"url": "https://github.com/greenshot/greenshot/commit/a152e2883fca7f78051b3bd6b1e5cc57355cb44c"
},
{
"tags": [
"x_transferred"
],
"url": "https://www.exploit-db.com/exploits/51633"
},
{
"tags": [
"x_transferred"
],
"url": "http://packetstormsecurity.com/files/173825/GreenShot-1.2.10-Arbitrary-Code-Execution.html"
},
{
"tags": [
"x_transferred"
],
"url": "http://packetstormsecurity.com/files/174222/Greenshot-1.3.274-Deserialization-Command-Execution.html"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2023-34634",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-10-23T20:45:38.126371Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2024-10-23T20:45:48.709Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Greenshot 1.2.10 and below allows arbitrary code execution because .NET content is insecurely deserialized when a .greenshot file is opened."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "n/a",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2023-08-17T18:06:56.417111",
"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"shortName": "mitre"
},
"references": [
{
"url": "https://greenshot.atlassian.net/browse/BUG-3061"
},
{
"url": "https://github.com/greenshot/greenshot/commit/a152e2883fca7f78051b3bd6b1e5cc57355cb44c"
},
{
"url": "https://www.exploit-db.com/exploits/51633"
},
{
"url": "http://packetstormsecurity.com/files/173825/GreenShot-1.2.10-Arbitrary-Code-Execution.html"
},
{
"url": "http://packetstormsecurity.com/files/174222/Greenshot-1.3.274-Deserialization-Command-Execution.html"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2023-34634",
"datePublished": "2023-08-01T00:00:00",
"dateReserved": "2023-06-07T00:00:00",
"dateUpdated": "2024-10-23T20:45:48.709Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
Vulnerability from fkie_nvd
Published
2023-08-01 14:15
Modified
2025-10-02 18:56
Severity ?
Summary
Greenshot 1.2.10 and below allows arbitrary code execution because .NET content is insecurely deserialized when a .greenshot file is opened.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| getgreenshot | greenshot | * |
{
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:getgreenshot:greenshot:*:*:*:*:*:*:*:*",
"matchCriteriaId": "D22DEA19-03C8-4FF9-AC4A-3CFBD979BD70",
"versionEndIncluding": "1.2.10.6",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Greenshot 1.2.10 and below allows arbitrary code execution because .NET content is insecurely deserialized when a .greenshot file is opened."
},
{
"lang": "es",
"value": "Greenshot 1.2.10 y versiones anteriores permiten la ejecuci\u00f3n de c\u00f3digo arbitrario porque el contenido .NET se deserializa de forma insegura cuando se abre un archivo .greenshot."
}
],
"id": "CVE-2023-34634",
"lastModified": "2025-10-02T18:56:36.150",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2023-08-01T14:15:10.070",
"references": [
{
"source": "cve@mitre.org",
"tags": [
"Exploit",
"Third Party Advisory",
"VDB Entry",
"Permissions Required"
],
"url": "http://packetstormsecurity.com/files/173825/GreenShot-1.2.10-Arbitrary-Code-Execution.html"
},
{
"source": "cve@mitre.org",
"tags": [
"Permissions Required"
],
"url": "http://packetstormsecurity.com/files/174222/Greenshot-1.3.274-Deserialization-Command-Execution.html"
},
{
"source": "cve@mitre.org",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/greenshot/greenshot/commit/a152e2883fca7f78051b3bd6b1e5cc57355cb44c"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory",
"Issue Tracking"
],
"url": "https://greenshot.atlassian.net/browse/BUG-3061"
},
{
"source": "cve@mitre.org",
"tags": [
"Exploit",
"Third Party Advisory",
"VDB Entry"
],
"url": "https://www.exploit-db.com/exploits/51633"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Exploit",
"Third Party Advisory",
"VDB Entry",
"Permissions Required"
],
"url": "http://packetstormsecurity.com/files/173825/GreenShot-1.2.10-Arbitrary-Code-Execution.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Permissions Required"
],
"url": "http://packetstormsecurity.com/files/174222/Greenshot-1.3.274-Deserialization-Command-Execution.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/greenshot/greenshot/commit/a152e2883fca7f78051b3bd6b1e5cc57355cb44c"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"Issue Tracking"
],
"url": "https://greenshot.atlassian.net/browse/BUG-3061"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Exploit",
"Third Party Advisory",
"VDB Entry"
],
"url": "https://www.exploit-db.com/exploits/51633"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}