What is CVE-2020-36656?

CVE-2020-36656 is a medium-severity vulnerability in Brainstormforce Spectra, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-02-21.

How severe is CVE-2020-36656?

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

Is CVE-2020-36656 known to be exploited?

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

XSS in Brainstormforce Spectra

CVE-2020-36656

The Spectra WordPress plugin before 1.15.0 does not sanitize user input as it reaches its style HTML attribute, allowing contributors to conduct stored XSS attacks via the plugin's Gutenberg blocks.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-02-21 · 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: 0.005 (41.0th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Brainstormforce Spectra
Spectra — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

20142995/nuclei-templates

References

wpscan.com/vulnerability/10f7e892-7a91-4292-b03e-6ad75756488b (Exploit, technical-description, Third Party Advisory, exploit, vdb-entry)

Frequently asked questions

What is CVE-2020-36656?: CVE-2020-36656 is a medium-severity vulnerability in Brainstormforce Spectra, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-02-21.
How severe is CVE-2020-36656?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2020-36656 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.