CVE-2021-27905 — exposed on the internet

Internet exposure observed by OffSeq scans · last 30 days

Found on 2 internet-exposed hosts by OffSeq scans; no in-the-wild exploitation has been observed against OffSeq honeypots in this window.

About CVE-2021-27905

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.

CWE-918

OffSeq internet scanning found CVE-2021-27905 on 2 exposed hosts in the last 30 days. OffSeq honeypots have not recorded in-the-wild exploitation of this CVE in the current window — this page tracks its exposure footprint and status; if exploitation begins, the live honeypot signal will appear here.

References