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CVE-2023-31286

18
FAUCET Score

CVE-2023-31286 is a medium-severity information disclosure vulnerability affecting Serenity Serene and StartSharp versions prior to 6.7.0. This flaw allows an unauthenticated attacker to enumerate valid usernames by observing differing server responses during password reset attempts for existing versus non-existent accounts. The CVSS score is 5.3, indicating a network-based attack with low complexity and a low impact on confidentiality. There is currently no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 6.7.0CPE matchmatch criteria
cpe:2.3:a:serenity:serene:*:*:*:*:*:*:*:*
< 6.7.0CPE matchmatch criteria
cpe:2.3:a:serenity:startsharp:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.01%
Probability of exploitation in next 30 days
EPSS Percentile
59.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0101 is in the 37th percentile among its peer group of 23,723 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
nugetpatch availablevia ghsa
Product: Serenity.Net.CoreFixed in: 6.7.0
nugetpatch availablevia ghsa
Product: Serenity.Net.WebFixed in: 6.7.0

Vendor Advisories (1)

nugetGHSA-w7jm-9x4m-8qc3medium

User account enumeration in Serenity

Apr 27, 2023

References

seclists.org / fulldisclosure/2023/May/14
packetstormsecurity.com / files/172648/Serenity-StartSharp-Software-File-Upload-XSS-User-Enumeration-Reusable-Tokens.html
seclists.org / fulldisclosure/2023/May/14
github.com / serenity-is/Serenity/commit/11b9d267f840513d04b4f4d4876de7823a6e48d2
PatchVendor Advisory