Not rated
CVE-2021-27905 The ReplicationHandler (normally registered at "/replication" under a Solr core) in Apache Solr has a "masterUrl"…
Description
The ReplicationHandler (normally registered at "/replication" under a Solr core) in Apache Solr has a "masterUrl" (also "leaderUrl" alias) parameter that is used to designate another ReplicationHandler on another Solr core to replicate index data into the local core. To prevent a SSRF vulnerability, Solr ought to check these parameters against a similar configuration it uses for the "shards" parameter. Prior to this bug getting fixed, it did not. This problem affects essentially all Solr versions prior to it getting fixed in 8.8.2.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Apache Solr 8.8 | earliest → < 8.8.2 | 8.8.2 |
Other CVEs of Apache Solr
The 24 CVEs of Apache Solr →
CVE-2026-44825
Hardcoded credentials in the Basic Authentication setup tool (bin/solr auth enable) in Apache Solr versions 9.4.0…
8.1
High
CVE-2026-22022
Deployments of Apache Solr 5.3.0 through 9.10.0 that rely on Solr's "Rule Based Authorization Plugin" are vulnerable…
Not rated
CVE-2026-22444
The "create core" API of Apache Solr 8.6 through 9.10.0 lacks sufficient input validation on some API parameters,…
Not rated
CVE-2025-24814
Core creation allows users to replace "trusted" configset files with arbitrary configuration Solr instances that (1) use…
Not rated