Vulnpedia
← All CVEs

CVE-2026-77787

LOW 2.7 PoC AVAILABLE

Published 2026-09-02 · Last modified 2026-09-02

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.

EXPLOIT AVAILABLE

Public exploit or PoC code exists. Modeled probability is still low, but the barrier to attack is reduced — watch closely.

Exploitation likelihood

0.2%chance of exploitation in 30 days · 6th percentile

○ In CISA KEV ● Public exploit / PoC

Impact if exploited

2.7CVSS 3.1 · LOW

  • ConfidentialityNone
  • IntegrityLow
  • AvailabilityNone

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ⚠Privileges: Requires an admin / high-privilege account
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept & exploit code

Test against your own equipment

curl -s https://vulnpedia.com/cve/CVE-2026-77787/poc.jsonMachine-readable PoC index for this CVE (for automation).

Listed for defensive triage, patch verification, and authorized testing on systems you own. Machine-readable: /cve/CVE-2026-77787/poc.json

Affected

Vendors Unknown

Products Rank Math Seo

Weakness (CWE)

  • CWE-862: Missing Authorization

CVSS vector

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

All CVSS metrics

  • LOW 2.7 v3.1 · ADP Primary
    CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
  • LOW 2.7 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N

References

Exploits & PoC

Sources: NVD · CVE.org · EPSS