CVE-2026-77788
Rank Math SEO < 1.0.277 - Author+ Arbitrary Post and User Metadata Overwrite via updateSchemas
The Rank Math SEO WordPress plugin before 1.0.277 does not verify that the metadata row being updated belongs to the object the user was authorised against, allowing users with the Author role and above to overwrite arbitrary post and user metadata, including that belonging to higher-privileged users.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Rank Math SEO < 1.0.277 - Author+ Arbitrary Post and User Metadata Overwrite via updateSchemas
The Rank Math SEO WordPress plugin before 1.0.277 does not verify that the metadata row being updated belongs to the object the user was authorised against, allowing users with the Author role and above to overwrite arbitrary post and user metadata, including that belonging to higher-privileged users.
- Record
CVE-2026-77788- CVSS 3.1
- 4.9 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-639
- Updated
- 2026-11-02
EUVDEUVD-2026-69842
The Rank Math SEO WordPress plugin before 1.0.277 does not verify that the metadata row being updated belongs to the object the user was authorised against, allowing users with the Author role and above to overwrite arbitrary post and user metadata, including that belonging to higher-privileged users.
- Record
EUVD-2026-69842- CVSS 3.1
- 4.9 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-4vrc-p2pf-p4qj
The Rank Math SEO WordPress plugin before 1.0.277 does not verify that the metadata row being...
The Rank Math SEO WordPress plugin before 1.0.277 does not verify that the metadata row being updated belongs to the object the user was authorised against, allowing users with the Author role and above to overwrite arbitrary post and user metadata, including that belonging to higher-privileged users.
- Record
GHSA-4vrc-p2pf-p4qj- CVSS 3.1
- 4.9 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-639
- Updated
- 2026-11-02
NVD
The Rank Math SEO WordPress plugin before 1.0.277 does not verify that the metadata row being updated belongs to the object the user was authorised against, allowing users with the Author role and above to overwrite arbitrary post and user metadata, including that belonging to higher-privileged users.
- Record
CVE-2026-77788- CVSS 3.1
- 4.9 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-639
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-77788 is a medium vulnerability (CVSS 4.9) in Rank Math Seo Math Seo, published September 2, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.33%, the 26th percentile. No source names a fixed version.