CVE-2023-37658

5.4 mediumEPSS 0.4%

Medium (5.4) in fastposter fast-poster. EPSS 0.4% chance of exploitation in the next 30 days.

fast-poster v2.15.0 is vulnerable to Cross Site Scripting (XSS). File upload check binary of img, but without strictly check file suffix at /server/fast.py -> ApiUploadHandler.post causes stored XSS

Severity

CVSS 3.1

5.4 medium

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

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 32% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2023-07-11
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

fastposter:fast-poster

References

https://github.com/psoho/fast-poster/issues/13
https://github.com/psoho/fast-poster/issues/13

Check your stack JSON