CVE-2026-89261: Missing Auth (CVSS 6.5)

Description

MoguBlog through 6.2 exposes Elasticsearch index management endpoints in the mogu_search service without authentication, allowing remote attackers to delete, recreate, or alter the blog search index. Attackers can invoke POST endpoints to wipe the entire search index, delete specific documents, or inject malicious index entries, causing search functionality to return incorrect or no results.

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CVSS v3.1 Score

6.5

MEDIUM

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

EPSS — Exploit Prediction

0.0046

Probability of exploitation

0.39%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-306 Missing Authentication

References

Other References

https://gitee.com/moxi159753/mogu_blog_v2/releases https://github.com/LinYuanyi1/cve-request-poc/blob/master/mogublog-poc/C05_search_initElasticSearchIndex.py https://github.com/LinYuanyi1/cve-request-poc/blob/master/mogublog-poc/C06_search_deleteElasticSearchByUids.py https://github.com/LinYuanyi1/cve-request-poc/blob/master/mogublog-poc/C07_search_deleteElasticSearchByUid.py https://github.com/LinYuanyi1/cve-request-poc/blob/master/mogublog-poc/C11_search_addElasticSearchIndexByUid.py https://github.com/moxi624/mogu_blog_v2 https://github.com/moxi624/mogu_blog_v2/blob/025d78c7ac7e19b1abf796fa3cc158d855723d15/mogu_search/src/main/java/com/moxi/mogublog/search/config/WebSecurityConfig.java https://github.com/moxi624/mogu_blog_v2/blob/025d78c7ac7e19b1abf796fa3cc158d855723d15/mogu_search/src/main/java/com/moxi/mogublog/search/restapi/ElasticSearchRestApi.java https://www.vulncheck.com/advisories/mogublog-through-6.2-missing-authentication-for-elasticsearch-index-management-endpoints

Frequently Asked Questions

What is CVE-2026-89261? +

MoguBlog through 6.2 exposes Elasticsearch index management endpoints in the mogu_search service without authentication, allowing remote attackers to delete, recreate, or alter the blog search index. Attackers can invoke POST endpoints to wipe the entire search index, delete specific documents, or inject malicious index entries, causing search functionality to return incorrect or no results. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-89261? +

CVE-2026-89261 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0046, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-89261? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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