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CVE-2023-42659

27
FAUCET Score

CVE-2023-42659 is an unrestricted file upload vulnerability affecting WS_FTP Server versions prior to 8.7.6 and 8.8.4. An authenticated Ad Hoc Transfer user can exploit this flaw by crafting an API call to upload files to arbitrary locations on the server's operating system. With a CVSS score of 8.8 (HIGH), this vulnerability allows for complete compromise of confidentiality, integrity, and availability, requiring only low privileges and no user interaction. Currently, there is no public exploit code available, nor is there evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
< 8.7.6CPE matchmatch criteria
cpe:2.3:a:progress:ws_ftp_server:*:*:*:*:*:*:*:*
>= 8.8.0, < 8.8.4CPE matchmatch criteria
cpe:2.3:a:progress:ws_ftp_server:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
3.1
Impact Score
5.3
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.90%
Probability of exploitation in next 30 days
EPSS Percentile
55.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0090 is in the 51st percentile among its peer group of 17,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

community.progress.com / s/article/WS-FTP-Server-Service-Pack-November-2023
Vendor Advisory
progress.com / ws_ftp
Product