CVE-2021-41571
No exploitation reported by the sources we read.
- Published2022-02-01
- Fixed in2.7.3 · 2.6.4
- WeaknessCWE-863
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
In Apache Pulsar it is possible to access data from BookKeeper that does not belong to the topics accessible by the authenticated user. The Admin API get-message-by-id requires the user to input a topic and a ledger id. The ledger id is a pointer to the data, and it is supposed to be a valid it for the topic. Authorisation controls are performed against the topic name and there is not proper validation the that ledger id is valid in the context of such ledger. So it may happen that the user is able to read from a ledger that contains data owned by another tenant. This issue affects Apache Pulsar Apache Pulsar version 2.8.0 and prior versions; Apache Pulsar version 2.7.3 and prior versions; Apache Pulsar version 2.6.4 and prior versions.
Timeline
dates in UTC- 2022-02-0113:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-41571?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-41571?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD · OSV| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 2.7 | ≥ 2.7.0, < 2.7.3 | 2.7.3 | NVD |
| 2.6 | ≥ 2.6.0, < 2.6.4 | 2.6.4 | NVD |
| 2.8 | = 2.8.0 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 2.8 | ≥ 2.8.0, < 2.8.1 | 2.8.1 | OSV |
| 2.7 | ≥ 2.7.0, < 2.7.4 | 2.7.4 | OSV |
| 2.6 | ≤ 2.6.4 | no fix published | OSV |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
pulsar: Pulsar Admin API allows access to data from other tenants using getMessageById API
pulsar-client-admin as a component of Red Hat Integration Camel K 1
Fix
- Update Apache pulsar to 2.7.3 · 2.6.4
- No fix available, says the vendor Red Hat Product Security CVE-2021-41571 · 1 productAffected
Advisories and patches
- github.comPatch
- lists.apache.orgVendor Advisory
- pulsar.apache.orgPatch · Vendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Published
- 2022-02-01
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2021-41571?
Is CVE-2021-41571 actively exploited?
What is the CVSS score for CVE-2021-41571?
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.