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TI-2026-15113 Aliases CVE-2026-18386GHSA-6237-95m6-mmw4

Path traversal in cssimmon WP BackItUp Community Edition

Priority LOW 25CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-22 and the CVSS impact.

Summary

The WP BackItUp Community Edition plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 2.1.0 via the 'backup_file' parameter parameter. This makes it possible for authenticated attackers, with administrator-level access and above, to read the contents of arbitrary files on the server, which can contain sensitive information. The basename() normalization present in the handler only executes when the traversed target path does not exist, providing no protection against reads of existing files.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01109 66th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
cssimmonWP BackItUp Community Editionup to 2.1.0—No fix listedCNA
  • WP BackItUp Community Edition Vendorcssimmon Affected up to 2.1.0 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-18386
  2. 2026-10-03 Alias added: GHSA-6237-95m6-mmw4

References

Other 9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences