What is CVE-2020-35660?

CVE-2020-35660 is a medium-severity vulnerability in Monicahq Monica, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-04-14.

How severe is CVE-2020-35660?

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

Is CVE-2020-35660 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Monicahq Monica

CVE-2020-35660

Cross Site Scripting (XSS) in Monica before 2.19.1 via the journal page.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-04-14 · 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: 0.009 (57.9th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Monicahq Monica

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

ajmalabubakkr/CVE

References

www.huntr.dev/bounties/1-other-monica/ (Exploit, Third Party Advisory)
github.com/monicahq/monica/releases/tag/v2.19.1 (Third Party Advisory, Release Notes)
github.com/monicahq/monica/pull/4451 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2020-35660?: CVE-2020-35660 is a medium-severity vulnerability in Monicahq Monica, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-04-14.
How severe is CVE-2020-35660?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2020-35660 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.