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CVE-2021-36747

MediumPublished

Blackboard Learn through 9.1 allows XSS by an authenticated user via the Feedback to Learner form.

Published: Jul 20, 2021
Updated: Aug 4, 2024
Assigning CNA: mitre
Evidence observed: Aug 8, 2026

Primary CVSS

5.4/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS probability estimate

0.6%

Low · next 30 days

Percentile: 48.0%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Blackboard Learn through 9.1 allows XSS by an authenticated user via the Feedback to Learner form.

Sources

CVE-2021-36747PoC
Detailed proof-of-concept for CVE-2021-36747, a stored XSS vulnerability in Blackboard Learn 9.1, with reproduction steps and impact analysis for educational security research.

Responsible use

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