Attestkeep
Language: English
Sign up

Vulnerabilities / CVE-2021-27905

critical

CVE-2021-27905

solr: SSRF vulnerability with the Replication handler

Published Modified CWE 918
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GHSA7.1CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N
Red Hat8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Bitnami9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Trivy's own label is CRITICAL. Rated critical by NVD, Bitnami. Rated lower by GHSA (high), Red Hat (high).

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 packages and fixed versions

SourcePackageFixed in
bitnami::Bitnami Vulnerability Databasesolr8.8.2
debian 10lucene-solrno fix listed
debian 11lucene-solr3.6.2+dfsg-23
debian 12lucene-solr3.6.2+dfsg-23
debian 13lucene-solr3.6.2+dfsg-23
debian 14lucene-solr3.6.2+dfsg-23
debian 9lucene-solrno fix listed
echolucene-solr3.6.2+dfsg-23
maven::GitHub Security Advisory Mavenorg.apache.solr:solr-parent8.8.2

References

All 16 references

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.