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CVE-2026-19718 – Authentication Bypass / Weak PRNG Leading to Admin Takeover – BlogVault Backup & St

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Summary

CVE-2026-19718 is a high-severity authentication weakness affecting the BlogVault Backup & Staging WordPress plugin (along with the related MalCare WordPress Security and WP Remote plugins, which share the same underlying code). The flaw allows an unauthenticated attacker to recover a secret that binds a WordPress site to its remote management service, because that secret is generated using a weak pseudo-random number generator. Recovery of the secret can lead to administrative access on the affected site. The issue carries a CVSS v3.1 base score of 8.1 (High).

Technical details

  • Root cause: The secret token used to bind a site to BlogVault’s remote management/backup service is derived from a weak pseudo-random number generator, making it predictable or recoverable rather than cryptographically secure.
  • Trigger condition: An unauthenticated user is able to obtain data derived from this secret through normal plugin functionality, without needing valid credentials.
  • Attack vector: Network-based (AV:N); no privileges or user interaction are required, though the attack complexity is rated High (AC:H), indicating some non-trivial effort or precondition to recover the weak secret.
  • Impact: Successful recovery of the secret can allow an attacker to impersonate the remote management service and gain administrative access to the WordPress site, resulting in high impact to confidentiality, integrity, and availability.

Affected software

  • BlogVault Backup & Staging WordPress Plugin: versions 5.16 to less than 6.65
  • MalCare WordPress Security Plugin: versions 5.16 to less than 6.65
  • WP Remote WordPress Plugin: versions 5.16 to less than 6.65

Severity

  • CVSS v3.1 Base Score: 8.1 (High)
  • Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Update the BlogVault Backup & Staging plugin (and MalCare or WP Remote, if installed) to version 6.65 or later, where the weak secret generation has been remediated.
  • If patching is not immediately possible: Restrict or monitor access to the plugin’s remote-management endpoints where feasible, and rotate any site-binding secrets/API credentials associated with these plugins after upgrading to prevent continued use of a previously exposed or predictable secret.

How IONIX identifies potentially affected assets

IONIX matches the following signal against data already collected when it crawled the asset; identifying the technology sends no request beyond that crawl.

  • Raw response body: /wp-content/plugins/blogvault-real-time-backup/

References

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Map your entire attack surface (continously)

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Dozens of threat intel feeds using agentic technology are continuously analyzed to detect the appearance of proof-of-concept code, exploit kits, and indicators of active targeting. IONIX goes further by applying AI to proactively evaluate whether emerging vulnerabilities are likely to be exploited, even before PoCs go public.

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Not all CVEs matter. IONIX filters vulnerabilities by asking attacker-centric questions: Can it be reached from the internet? Does it require authentication? Is it being exploited in the wild? This dramatically reduces noise and focuses teams on threats that can actually be weaponized.

4

Create Safe, Scalable Exploit Validations

IONIX transforms real-world PoCs into safe, non-intrusive test payloads that can be run in production environments without disruption. These simulations are precisely targeted to the systems that are vulnerable, ensuring rapid validation without unnecessary load.

5

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By combining context about software stack, versioning, exposure status, and reachability, IONIX ensures that only the right payloads are executed against the right assets, maximizing efficiency and minimizing risk.

6

Drive Fast and Actionable Remediation

Results are routed through integrations with ticketing, SOAR, and SIEM tools. Issues are written in plain language, bundled into remediation clusters, and prioritized based on asset criticality, exploitability, and blast radius. This shortens mean time to remediation (MTTR) and empowers teams to act with confidence.

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