5.4

CVE-2021-20280: fedoraproject fedora Cross-site Scripting

CVSS: 5.4v3.1MediumModified
AliasesUBUNTU-CVE-2021-20280
Published 15-03-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-20280 is a medium (CVSS 5.4) Cross-site Scripting vulnerability in fedoraproject fedora. EPSS estimates a 1.27% chance of exploitation in the next 30 days, higher than 69.5% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
5.4/10
010
Medium · v3.1 (NVD)
EPSS score
1.27%
0%100%
Low · -0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 15-03-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

Text-based feedback answers required additional sanitizing to prevent stored XSS and blind SSRF risks in moodle before 3.10.2, 3.9.5, 3.8.8, 3.5.17.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.27%

Chance of exploitation in the next 30 days

Percentile

70%

Versus all other CVEs

30-day change

-0.01 pp

From 1.28% on 21-09-2026

21-09-202621-10-2026
EPSS score
1.27%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (packetstormsecurity.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Fedoraproject1 product
Moodle1 product
  • moodle≥ 3.5.0, < 3.5.17 | ≥ 3.8.0, < 3.8.8 | ≥ 3.9.0, < 3.9.5 | ≥ 3.10.0, < 3.10.2
Ubuntu1 product
  • moodleAll versions (No fix recorded)

3 vendors · 3 products

References

8 links