What is CVE-2023-30787?

CVE-2023-30787 is a medium-severity vulnerability in Monicahq Monica, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-05-08.

How severe is CVE-2023-30787?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Monicahq Monica

CVE-2023-30787

MonicaHQ version 4.0.0 allows an authenticated remote attacker to execute malicious code in the application via CSTI in the `people:id/introductions` endpoint and first_met_additional_info parameter.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-05-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (48.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Monicahq Monica — versions 4.0.0
Monicahq — versions 4.0.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

fluidattacks.com/advisories/napoli (Exploit, Third Party Advisory)
www.monicahq.com/ (Vendor Advisory)

Frequently asked questions

What is CVE-2023-30787?: CVE-2023-30787 is a medium-severity vulnerability in Monicahq Monica, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-05-08.
How severe is CVE-2023-30787?: Medium severity. CVSS v3 base score is 5.4 out of 10.