CVE-2026-77787 Rank Math SEO < 1.0.277 - Author+ Term Metadata Update and Cross-Object Post Title Overwrite via updateMetaBulk
Authors can modify SEO metadata of terms they cannot edit and overwrite titles of posts belonging to other users due to missing capability checks.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-77787?
CVE-2026-77787 is a low-severity missing authorization vulnerability in Unknown Rank Math SEO, published on 2 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The Rank Math SEO WordPress plugin before 1.0.277 does not perform a capability check when bulk metadata updates target taxonomy terms, and reuses the supplied object identifier across object types, allowing users with the Author role and above to modify the SEO metadata of terms they cannot edit and to overwrite the titles of posts belonging to other users.
Weakness: CWE-862
Which versions are affected by CVE-2026-77787?
How do I fix CVE-2026-77787?
No fix has been published for CVE-2026-77787 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-77787 being exploited?
There is no known exploitation of CVE-2026-77787 in the wild and no public exploit code.
Sources
Also known as GHSA-vxch-jpr2-q2xp.