01 Record
CVE-2026-28008
WordPress OAuth Single Sign On – SSO (OAuth Client) plugin <= 7.0.0 - Broken Authentication vulnerability
CriticalPUBLISHEDCNA: Patchstack
CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
02 Description
WordPress OAuth Single Sign On – SSO (OAuth Client) plugin <= 7.0.0 - Broken Authentication vulnerability
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 0.60% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 48.3% of scored records. A rank, not a probability.
- NVD base score
- 9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Deferred. NVD last modified this record on 2026-10-23.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-08-13 13:36Z2 MO AGO
- Last updated
- 2026-08-13 15:24Z2 MO AGO
- Reserved
- 2026-02-25
- Assigning CNA
- Patchstack
- Record state
- PUBLISHED
- Severity
- Critical (CVSS 9.8)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-290Authentication Bypass by SpoofingBase
- Data version
- 5.2
- Document digest
- 543d6efc5d4438572b92b27b1639c73ca40d0db91a1e3a1a3f66729e2a490a06
05 Affected products
VendorProductVersionsPlatforms
06 References
07 Remediation
Update the WordPress OAuth Single Sign On – SSO (OAuth Client) plugin to the latest available version (at least 7.0.1).