ConnectWise Control before 22.9.10032 (formerly known as ScreenConnect) fails to validate user-supplied parameters such as the Bin/ConnectWiseControl.Client.exe h parameter. This results in reflected data and injection of malicious code into a downloaded executable. The executable can be used to execute malicious queries or as a denial-of-service vector. NOTE: this CVE Record is only about the parameters, such as the h parameter (this CVE Record is not about the separate issue of signed executable files that are supposed to have unique configurations across customers' installations).
CVE-2023-25719
HIGHNVD 8.88.8—Elevated
EchelonGraph scoreMEDIUM confidence
Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2023-02-13. NVD baseline CVSS 8.8; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: Elevated riskExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 8.8
- EG Score
- 8.8(medium)
- EG Risk
- 56(Track*)EG Risk 56/100SSVC: Track*
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity88% × 45%Exploitation40% × 40%Automatability0% × 15%Action: Watch closely — could escalate to Attend. - EPSS PROB
- 1%
- EPSS %ILE
- 63%
- KEV
- Not listed
Published
February 13, 2023
Last Modified
June 19, 2025
References (7)
- cve@mitrehttps://cybir.com/2022/cve/hijacking-connectwise-control-and-ddos/
- cve@mitrehttps://m.youtube.com/watch?v=fbNVUgmstSc&pp=0gcJCf0Ao7VqN5tD
- cve@mitrehttps://www.connectwise.com/blog/cybersecurity/the-importance-of-responsible-security-disclosures
- af854a3a-2127-422b-91ae-364da2661108https://cybir.com/2022/cve/hijacking-connectwise-control-and-ddos/
- af854a3a-2127-422b-91ae-364da2661108https://www.connectwise.com
- af854a3a-2127-422b-91ae-364da2661108https://www.connectwise.com/blog/cybersecurity/the-importance-of-responsible-security-disclosures
- af854a3a-2127-422b-91ae-364da2661108https://www.huntress.com/blog/clearing-the-air-overblown-claims-of-vulnerabilities-exploits-severity
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Frequently asked(5)
What is CVE-2023-25719?
CVE-2023-25719 is a high vulnerability published on February 13, 2023. ConnectWise Control before 22.9.10032 (formerly known as ScreenConnect) fails to validate user-supplied parameters such as the Bin/ConnectWiseControl.Client.exe h parameter. This results in reflected data and injection of malicious code into a downloaded executable. The executable can be used to…
When was CVE-2023-25719 disclosed?
CVE-2023-25719 was first published in the National Vulnerability Database on February 13, 2023, with the most recent update on June 19, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-25719 actively exploited?
CVE-2023-25719 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 36.8% of all scored CVEs.
What is the CVSS score of CVE-2023-25719?
CVE-2023-25719 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2023-25719?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-25719, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
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