Security readout for executives and security teams
Plain-English summary
CVE-2026-1311 affects the Worry Proof Backup WordPress plugin through version 0.2.4. A logged-in user with Subscriber-level access could upload a crafted backup ZIP that writes files outside the intended folder. Sources state this can include PHP files, creating a path to remote code execution on the website.
Executive priority
Treat as high priority for affected WordPress sites. The business risk is site takeover from a low-privilege account. Prioritize internet-facing sites, sites allowing user registration, and sites handling sensitive data or revenue-generating functions.
Technical view
The issue is CWE-22 path traversal in backup upload handling. Authenticated low-privilege users can include traversal sequences in a ZIP archive, causing arbitrary server-side file writes during extraction. The CVSS 3.1 score is 8.8, with low attack complexity, network access, low privileges required, no user interaction, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to WordPress sites running Worry Proof Backup versions up to and including 0.2.4, especially where untrusted users can obtain Subscriber accounts. No source in the bundle identifies a patched version.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. Exploitation requires authenticated access but only Subscriber-level privileges, which many WordPress sites allow through registration, membership, or compromised low-privilege accounts.
Researcher notes
Sources identify path traversal in upload-backup.php around line 97 in trunk and version 0.2.4. The public description states arbitrary file write, including executable PHP. The provided sources do not name a fixed version, exploitation in the wild, or detailed vendor remediation.
Mitigation direction
- Identify all WordPress sites using Worry Proof Backup.
- Check whether installed versions are 0.2.4 or earlier.
- Review vendor and WordPress plugin guidance for a fixed release or removal advice.
- Disable or remove the plugin if not required.
- Restrict public user registration where business requirements allow.
- Review Subscriber and other low-privilege accounts for unauthorized access.
Validation and detection
- Inventory plugin name and version across WordPress environments.
- Confirm whether untrusted users can create or access Subscriber accounts.
- Review recent backup upload activity for unexpected ZIP uploads.
- Inspect web directories for unexpected recently created PHP files.
- Check security logs for low-privilege users performing backup upload actions.
- Monitor Wordfence, CVE, and WordPress plugin sources for update status.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-22: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-1311 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/3ffd6ce0-2536-43a5-9925-438bc653d0e5?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/worry-proof-backup/trunk/inc/libs/upload-backup.php#L97CVE reference
- https://plugins.trac.wordpress.org/browser/worry-proof-backup/tags/0.2.4/inc/libs/upload-backup.php#L97CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.