CVE-2026-86827

Status: DeferredMedium (5.3)—

The BackWPup WordPress plugin before 5.7.7 does not verify that a request to its cron-triggered backup execution handler actually originates from WordPress's internal scheduled-event dispatch, allowing unauthenticated attackers to force any existing backup job to run immediately, independent of its configured trigger type or schedule.

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Base score: 5.3

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.22%
Percentile among all scored CVEs: 11
Score date: 10/17/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1190 Exploit Public-Facing Applicationinitial access60 %
Primary impactT1078 Valid Accountsstealth · persistence · privilege escalation · initial access55 %

Inferred by deterministic rules from the CVSS vector and CWE. Indicative only.

🛡️ ATT&CK mitigations that cover these techniques

Privileged Account Management Application Developer Guidance Active Directory Configuration Vulnerability Scanning User Training User Account Management

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Backwpup — Backwpup^AI

CWEs

CWE-862

References

https://wpscan.com/vulnerability/c7785a5b-f580-416f-a23d-58c28c717b60/

Raw JSON (NVD)

Show

{
  "id": "CVE-2026-86827",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-86827",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-10-08T10:55:34.997021Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "contact@wpscan.com",
      "affectedData": [
        {
          "vendor": "Unknown",
          "product": "BackWPup",
          "versions": [
            {
              "status": "affected",
              "version": "3.3",
              "lessThan": "5.7.7",
              "versionType": "semver"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-10-08T06:16:44.987",
  "references": [
    {
      "url": "https://wpscan.com/vulnerability/c7785a5b-f580-416f-a23d-58c28c717b60/",
      "source": "contact@wpscan.com"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-862"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The BackWPup  WordPress plugin before 5.7.7 does not verify that a request to its cron-triggered backup execution handler actually originates from WordPress's internal scheduled-event dispatch, allowing unauthenticated attackers to force any existing backup job to run immediately, independent of its configured trigger type or schedule."
    }
  ],
  "lastModified": "2026-10-08T20:51:18.123",
  "sourceIdentifier": "contact@wpscan.com"
}