CVE-2021-43559 Details
A vulnerability classified as problematic was found in Moodle up to 3.9.10/3.10.7/3.11.3 (Learning Management Software). This vulnerability affects an unknown part of the component Delete Related Badge. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.
View at NVD
Exploit prediction scoring system (EPSS) score for CVE-2021-43559
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
0.17 Probability of exploitation activity being observed over the next 30 days (39th percentile)
CVSS score for CVE-2021-43559
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
8.8 High
Products affected by CVE-2021-43559

CVE-2021-43559 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 2,464 23.93%
DE 616 5.98%
RU 594 5.77%
KR 566 5.50%
FR 395 3.84%
SG 383 3.72%
IN 374 3.63%
BR 345 3.35%
ID 291 2.83%
GB 269 2.61%

Is CVE-2021-43559 part of your extended attack surface? Bitsight helps security leaders rapidly identify exposure and detect threats in order to prioritize, communicate, and mitigate risk.

View interactive product tours

CVE-2021-43559 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Technology 5,736 77.33%
Telecommunications 748 10.08%
Education 583 7.86%
Government/Politics 188 2.53%
Business Services 39 0.53%
Nonprofit/NGO 32 0.43%
Healthcare/Wellness 12 0.16%
Manufacturing 11 0.15%
Transportation 9 0.12%
Media/Entertainment 7 0.09%

Bitsight, the leading provider in Cyber Risk Management, introduced the next-generation internet scanner Bitsight Groma in May 2024. This technology continuously scans the entire internet to discover assets, collect asset attribution evidence, and identify an ever-growing set of security observations, such as vulnerabilities and misconfigurations. Groma’s scanning activities presently encompass:


  • 40 million-plus monitored organizations
  • 250 million-plus host names
  • 4 billion-plus routable IPv4 and IPv6 addresses

Greynoise’s recent study testifies the speed of Bitsight Groma.

Bitsight data discovery
Governance charcoal background

Bitsight TRACE team investigates security incidents and identifies vulnerabilities and threats.

View latest security research 

See what you’re up against across the expanding attack surface. Prioritize what matters most. And mitigate where you’re most vulnerable.

External Attack Surface Management

Bitsight ASA Report Image

Reducing exposure starts with knowing exactly how your external attack surface stands—from your overall standing to each digital and cloud asset around the world. Bitsight's custom report gives you the insights you need to see your entire external attack surface.