CVE-2021-43129Public exploitNetwork attack vector

Quiz content copying via omitted URL parameters

Published Apr 19, 2022 · Updated Aug 4, 2024

Access control bypass in D2L Brightspace 20.21.7 allows remote authenticated users to copy restricted quiz content via a modified quiz URL. The quiz-start page applies its browser restrictions only when the isprv and drc query parameters are present, letting a learner remove them and reload. Access to an active quiz attempt is required; the learner can then highlight, copy, paste, or print the displayed quiz content.

CVSS severity6.5
Medium
EPSS probability1.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Access control bypass in D2L Brightspace 20.21.7 allows remote authenticated users to copy restricted quiz content via a modified quiz URL. The quiz-start page applies its browser restrictions only when the isprv and drc query parameters are present, letting a learner remove them and reload. Access to an active quiz attempt is required; the learner can then highlight, copy, paste, or print the displayed quiz content.

The record

CVE
CVE-2021-43129
Published
Apr 19, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
Unavailable
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 19, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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