6.1

CVE-2021-29272: microco bluemonday Cross-site Scripting

CVSS: 6.1v3.1MediumModified
AliasesUBUNTU-CVE-2021-29272GHSA-3x58-xr87-2fcjGO-2022-0762
Published 27-03-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-29272 is a medium (CVSS 6.1) Cross-site Scripting vulnerability in microco bluemonday. EPSS estimates a 0.93% chance of exploitation in the next 30 days, higher than 59.9% of scored vulnerabilities.

Overall risk
25/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.1/10
010
Medium · v3.1 (NVD)
EPSS score
0.93%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 27-03-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

bluemonday before 1.0.5 allows XSS because certain Go lowercasing converts an uppercase Cyrillic character, defeating a protection mechanism against the "script" string.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.93%

Chance of exploitation in the next 30 days

Percentile

60%

Versus all other CVEs

30-day change

0.00 pp

From 0.93% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.93%

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

Github.com/microcosm-cc1 product
  • bluemonday< 1.0.5
Microco1 product
Ubuntu1 product
  • golang-github-microcosm-cc-bluemondayAll versions (No fix recorded)

3 vendors · 3 products

References

10 links