PatchSiren cyber security CVE debrief

CVE-2026-89263 moxi624 CVE debrief

CVE-2026-89263 debrief: MoguBlog through 6.2 has an unauthenticated endpoint that allows disabling email notifications for arbitrary users. This vulnerability enables attackers to suppress email notifications without authorization, potentially impacting user engagement and security response. Defenders should assess exposure and implement mitigations, especially for systems using MoguBlog versions up to 6.2. The CVE record and NVD entry provide details on the vulnerability, but additional verification is required for exploitation, impact, and remediation.

Vendor: moxi624
Product: MoguBlog
CVSS: MEDIUM 6.9
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-09-11
Original CVE updated: 2026-09-11
Advisory published: 2026-09-11
Advisory updated: 2026-09-11

Who should care

Defenders and administrators of systems using MoguBlog, especially those using versions up to 6.2, should assess exposure and implement mitigations. This includes verifying MoguBlog versions, checking for exposure, and implementing authentication for the /web/comment/closeEmailNotification endpoint. Additionally, defenders should monitor for unauthorized modifications to email notification settings and review compensating controls for exposed systems.

Why it matters

CVE-2026-89263 is a medium-severity vulnerability in MoguBlog that allows unauthenticated attackers to disable email notifications for arbitrary users. Defenders should prioritize verifying and mitigating exposure, especially for systems using MoguBlog versions up to 6.2.

attackers can suppress email notifications for arbitrary users without authorization
defenders need to verify and mitigate exposure to this vulnerability
requires authentication and authorization for the /web/comment/closeEmailNotification endpoint

Technical summary

MoguBlog through 6.2 fails to authenticate requests to the /web/comment/closeEmailNotification endpoint, allowing unauthenticated attackers to disable email notifications for arbitrary users by modifying the startEmailNotification flag in Redis cache. This vulnerability has a medium-severity CVSS score of 6.9 and requires defenders to prioritize verifying and mitigating exposure, especially for systems using MoguBlog versions up to 6.2. The CVE record and NVD entry provide details on the vulnerability, but additional verification is required for exploitation, impact, and remediation.

Defensive priority

Defenders should prioritize verifying and mitigating exposure to this vulnerability, especially for systems using MoguBlog versions up to 6.2.

Recommended defensive actions

Verify MoguBlog version and check for exposure
Implement authentication for the /web/comment/closeEmailNotification endpoint
Monitor for unauthorized modifications to email notification settings
Review compensating controls for exposed systems
Check relevant monitoring, detection, and logs for exposed assets
Track exceptions and retest remediated assets
Plan vendor-supported updates or mitigations through normal change control

Evidence notes

The CVE record and NVD entry provide details on the vulnerability in MoguBlog. However, the corpus does not establish versions beyond 6.2, exploitation, impact, or remediation, which require verification from official sources. Defenders should verify MoguBlog versions, check for exposure, and implement authentication for the /web/comment/closeEmailNotification endpoint. Monitoring for unauthorized modifications to email notification settings is also recommended.

Sources and references

Verified primary and authoritative sources

CVE-2026-89263 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2026-89263

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2026-89263 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-89263

NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Source reference
Unverified legacy reference

URL: https://gitee.com/moxi159753/mogu_blog_v2/releases

[email protected]
Source reference
Unverified legacy reference

URL: https://github.com/LinYuanyi1/cve-request-poc/blob/master/mogublog-poc/C08_comment_closeEmailNotification.py

[email protected]
Source reference
Unverified legacy reference

URL: https://github.com/moxi624/mogu_blog_v2

[email protected]
Source reference
Unverified legacy reference

URL: https://github.com/moxi624/mogu_blog_v2/blob/025d78c7ac7e19b1abf796fa3cc158d855723d15/mogu_web/src/main/java/com/moxi/mogublog/web/config/WebSecurityConfig.java

[email protected]
Source reference
Unverified legacy reference

URL: https://github.com/moxi624/mogu_blog_v2/blob/025d78c7ac7e19b1abf796fa3cc158d855723d15/mogu_web/src/main/java/com/moxi/mogublog/web/restapi/CommentRestApi.java

[email protected]
Source reference
Unverified legacy reference

URL: https://www.vulncheck.com/advisories/mogublog-through-6.2-missing-authentication-on-the-comment-email-notification-endpoint

[email protected]

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.