5.5

CVE-2021-36827: ninjaforms ninja_forms Cross-site Scripting

CVSS: 5.5v3.1MediumModified
Published 16-06-2022Last modified 28-04-2026
Open JSON

Vulnerability summary

CVE-2021-36827 is a medium (CVSS 5.5) Cross-site Scripting vulnerability in ninjaforms ninja_forms. EPSS estimates a 0.52% chance of exploitation in the next 30 days, higher than 42.6% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (wordfence)
EPSS score
0.52%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 16-06-2022
    PublishedVulnerability first disclosed.
  2. 28-04-2026
    Last modifiedVulnerability information updated.

Description

Auth. (admin+) Stored Cross-Site Scripting (XSS) vulnerability in Saturday Drive's Ninja Forms Contact Form plugin <= 3.6.9 at WordPress via "label".

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.52%

Chance of exploitation in the next 30 days

Percentile

43%

Versus all other CVEs

30-day change

+0.01 pp

From 0.50% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.52%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ninjaforms1 product
Saturday drive1 product
Wordpress1 product
  • ninja-forms≤ 3.6.9 (fixed in 3.6.10)

3 vendors · 3 products

References

2 links