CVE-2021-29943
When using ConfigurableInternodeAuthHadoopPlugin for authentication, Apache Solr versions prior to 8.8.2 would forward/proxy distributed requests using server credentials instead of original client credentials.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.67%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
When using ConfigurableInternodeAuthHadoopPlugin for authentication, Apache Solr versions prior to 8.8.2 would forward/proxy distributed requests using server credentials instead of original client credentials. This would result in incorrect authorization resolution on the receiving hosts.
- CVSS 3.1
- 9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 4.67% probability · 92th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-863
- Affected
- apache/solr
- Source
- security@apache.org
EPSS 4.7% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://lists.apache.org/thread.html/r91dd0ff556e0c9aab4c92852e0e540c59d4633718ce12881558cf44d%40%3Cusers.solr.apache.org%3EMailing List, Vendor Advisory
- https://security.netapp.com/advisory/ntap-20210604-0009/Third Party Advisory
- https://lists.apache.org/thread.html/r91dd0ff556e0c9aab4c92852e0e540c59d4633718ce12881558cf44d%40%3Cusers.solr.apache.org%3EMailing List, Vendor Advisory
- https://security.netapp.com/advisory/ntap-20210604-0009/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.