CVE-2023-31285

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-04-27 · updated 2026-06-17
Weakness: CWE-79

Description

An XSS issue was discovered in Serenity Serene (and StartSharp) before 6.7.0. When users upload temporary files, some specific file endings are not allowed, but it is possible to upload .html or .htm files containing an XSS payload. The resulting link can be sent to an administrator user.

Affected products

Serenity Serene: before 6.7.0 — fixed in 6.7.0
Serenity Startsharp: before 6.7.0 — fixed in 6.7.0

How to fix

Upgrade to a fixed version: Serenity Serene 6.7.0; Serenity Startsharp 6.7.0. Check the vendor advisory for mitigations.

References

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

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