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Vulnerability record · CVE-2021-29262 · published 13 April 2021

CVE-2021-29262: Apache solr insufficiently protected credentials vulnerability

Apache · Solr

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.

7.5 CVSS 3.1 High EPSS 6.7% · top 6.3% CWE-522 · Insufficiently protected credentials
7.5CVSS 3.1 base score, v2 4.3
6.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
24References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://lists.apache.org/thread.html/r1171f6417eeb6d5e1206d53e2b2ff2d6ee14026f8b595ef7d8a33b79%40%3Coak-issues.jackrabbi
https://lists.apache.org/thread.html/r1e92a2eff6c47a65c4a6e95e809a9707181de76f8062403a0bea1012%40%3Coak-issues.jackrabbi
https://lists.apache.org/thread.html/r51b29ff62060b67bc9999ded5e252b36b09311fe5a02d27f6de3e4d3%40%3Coak-issues.jackrabbi
https://lists.apache.org/thread.html/r536da4c4e4e406f7843461cc754a3d0a3fe575aa576e2b71a9cd57d0%40%3Cannounce.apache.org% Mailing ListVendor Advisory
https://lists.apache.org/thread.html/r7151081abab92a827a607205c4260b0a3d22280b52d15bc909177608%40%3Coak-issues.jackrabbi
https://lists.apache.org/thread.html/r8d35eeb9a470d2682b5bcf3be0b8942faa7e28f9ca5861c058d17fff%40%3Coak-issues.jackrabbi
https://lists.apache.org/thread.html/r9c4ce6903218c92ef2583070e64af5a69e483821c4b3016dc41e3c6f%40%3Coak-issues.jackrabbi
https://lists.apache.org/thread.html/rb6db683903174eaa44ec80cc118a38574319b0d4181f36b61ee6278f%40%3Cdev.jackrabbit.apach
https://lists.apache.org/thread.html/rbc680cbfd745f22d182158217428a296e8e398cde16f3f428fe4bddc%40%3Coak-issues.jackrabbi
https://lists.apache.org/thread.html/rd85f87e559ee27e9c69795e3ad93a77621895e0328ea3df41d711d72%40%3Coak-commits.jackrabb
https://lists.apache.org/thread.html/ref84e60192f4bdc3206b247f260513e8d4e71f3e200792f75386d07a%40%3Cdev.jackrabbit.apach
https://security.netapp.com/advisory/ntap-20210604-0009/ Third Party Advisory
https://lists.apache.org/thread.html/r1171f6417eeb6d5e1206d53e2b2ff2d6ee14026f8b595ef7d8a33b79%40%3Coak-issues.jackrabbi
https://lists.apache.org/thread.html/r1e92a2eff6c47a65c4a6e95e809a9707181de76f8062403a0bea1012%40%3Coak-issues.jackrabbi
https://lists.apache.org/thread.html/r51b29ff62060b67bc9999ded5e252b36b09311fe5a02d27f6de3e4d3%40%3Coak-issues.jackrabbi
https://lists.apache.org/thread.html/r536da4c4e4e406f7843461cc754a3d0a3fe575aa576e2b71a9cd57d0%40%3Cannounce.apache.org% Mailing ListVendor Advisory
https://lists.apache.org/thread.html/r7151081abab92a827a607205c4260b0a3d22280b52d15bc909177608%40%3Coak-issues.jackrabbi
https://lists.apache.org/thread.html/r8d35eeb9a470d2682b5bcf3be0b8942faa7e28f9ca5861c058d17fff%40%3Coak-issues.jackrabbi
https://lists.apache.org/thread.html/r9c4ce6903218c92ef2583070e64af5a69e483821c4b3016dc41e3c6f%40%3Coak-issues.jackrabbi
https://lists.apache.org/thread.html/rb6db683903174eaa44ec80cc118a38574319b0d4181f36b61ee6278f%40%3Cdev.jackrabbit.apach
https://lists.apache.org/thread.html/rbc680cbfd745f22d182158217428a296e8e398cde16f3f428fe4bddc%40%3Coak-issues.jackrabbi
https://lists.apache.org/thread.html/rd85f87e559ee27e9c69795e3ad93a77621895e0328ea3df41d711d72%40%3Coak-commits.jackrabb
https://lists.apache.org/thread.html/ref84e60192f4bdc3206b247f260513e8d4e71f3e200792f75386d07a%40%3Cdev.jackrabbit.apach
https://security.netapp.com/advisory/ntap-20210604-0009/ Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2021-29262), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.