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Public proof of conceptFix available

CVE-2023-34634

A public proof of concept exists; no exploitation attested.

  • Published2023-08-01

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Greenshot 1.2.10 and below allows arbitrary code execution because .NET content is insecurely deserialized when a .greenshot file is opened.

Timeline

dates in UTC
  1. 2023-07-28Exploit-DB entryExploit-DB
  2. 2023-08-0114:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-34634?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-34634?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Getgreenshot greenshot
BranchAffectedFixed in
1.2≤ 1.2.10.6no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

Detection

read 2026-11-02 22:42 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
EDB-51633
Exploit-DB
Proof-of-concept repositories
2 repositories, unverifiedradman404/CVE-2023-34634LBVDSEC/GreenshotShell-CVE-2023-34634
PoC-in-GitHub
Metasploit modules
1 moduleexploit/windows/fileformat/greenshot_deserialize_cve_2023_34634rank: excellentModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2023-08-01
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-8743-hwvq-mj5j

Frequently asked questions

What is CVE-2023-34634?

Greenshot 1.2.10 and below allows arbitrary code execution because .NET content is insecurely deserialized when a .greenshot file is opened.

Is CVE-2023-34634 actively exploited?

Active exploitation of CVE-2023-34634 has not been confirmed. Its EPSS score was 7.6% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-34634?

CVE-2023-34634 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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Sources for this record