THREATPORT/VULNERABILITY/CVE-2021-29262
HIGH SEVERITY

CVE-2021-29262

Solr vulnerability

CVSS
7.5
EPSS
7.8%
EPSS pct
94th
Exploited
No known
When starting Apache Solr versions prior to 8.8.2, configured with the SaslZkACLProvider or VMParamsAllAndReadonlyDigestZkACLProvider and no existing security.json znode, if the optional read-only user is configured then Solr would not treat that node as a sensitive path and would allow it to be readable. Additionally, with any ZkACLProvider, if the security.json is already present, Solr will not automatically update the ACLs.
Affected vendor
Apache
Affected product
Solr
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness type (CWE)
  • CWE-522 — Insufficiently Protected Credentials
Published
2021-04-13

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality.

Its EPSS score of 7.8% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 94% of all scored CVEs.

Check your external exposure to CVE-2021-29262

  • Confirm whether Apache Solr is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-29262.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-29262

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