CVE-2026-77787Network attack vectorHinoki check available

Cross-object metadata overwrite via unchecked bulk updates

Published Sep 2, 2026 · Updated Sep 2, 2026

Missing authorization in Rank Math SEO before 1.0.277 allows remote authenticated users to alter SEO metadata and other users' post titles. The updateMetaBulk path omits a capability check for taxonomy terms and reuses a supplied object identifier when choosing term or post metadata writes. Author-level access is sufficient to change metadata for uneditable terms and overwrite titles on posts owned by other users.

CVSS severity2.7
Low
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Missing authorization in Rank Math SEO before 1.0.277 allows remote authenticated users to alter SEO metadata and other users' post titles. The updateMetaBulk path omits a capability check for taxonomy terms and reuses a supplied object identifier when choosing term or post metadata writes. Author-level access is sufficient to change metadata for uneditable terms and overwrite titles on posts owned by other users.

The record

CVE
CVE-2026-77787
Published
Sep 2, 2026
Updated
Sep 2, 2026
Vendor
Rank Math SEO
Product
Rank Math SEO
Classifications
CWE-862, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.255 <1.0.277

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Rank Math SEO · Rank Math SEOversion=1.0.255 <1.0.277

Published CVSS scores

2.7CISA ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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