Security readout for executives and security teams
Plain-English summary
CVE-2026-5581 lets unauthenticated attackers delete WordPress media files on sites using Multi Uploader for Gravity Forms through version 1.1.8. The business impact is loss of images, documents, and other media, potentially breaking pages and forms. No active exploitation is shown in the provided sources or KEV status.
Executive priority
Treat as urgent for affected public WordPress sites because it can destroy media without login. Prioritize externally facing marketing, ecommerce, and customer-service sites where missing media would disrupt operations or brand presentation.
Technical view
The plugin lacks authorization checks in plupload_ajax_delete_file(), exposed through wp_ajax_nopriv_gfmu_delete_file. A CSRF nonce is exposed in the GFMU_options JavaScript object on public pages containing a multi-uploader form field. An unauthenticated attacker can target attachment IDs for deletion. CVSS is 9.1, CWE-862.
Likely exposure
Exposure is limited to WordPress sites running Multi Uploader for Gravity Forms versions up to and including 1.1.8, especially sites with public-facing forms containing multi-uploader fields. Sites not using this plugin are not indicated as affected by the provided sources.
Exploitation context
The CVSS vector indicates network access, low complexity, no privileges, and no user interaction. Impact is integrity and availability, not confidentiality. Provided sources do not show KEV listing or confirmed active exploitation. Attack feasibility depends on the vulnerable plugin being active and relevant public form pages exposing the nonce.
Researcher notes
The provided record cites Wordfence and WordPress Trac code references for the vulnerable handler and public JavaScript exposure. A Trac changeset is referenced, but the provided bundle does not explicitly name a fixed version. Validate remediation against current vendor or repository guidance.
Mitigation direction
- Inventory WordPress sites for Multi Uploader for Gravity Forms <= 1.1.8.
- Disable the plugin or affected public uploader forms until vendor guidance is confirmed.
- Back up and protect the WordPress media library before remediation work.
- Check the plugin repository, vendor advisories, and Wordfence for a patched release.
- Restore deleted media from backups if suspicious deletion is identified.
Validation and detection
- Confirm whether gf-multi-uploader is installed and active on WordPress sites.
- Check plugin version and flag versions up to 1.1.8.
- Identify public pages containing multi-uploader Gravity Forms fields.
- Review whether plupload_ajax_delete_file() has capability checks in the installed code.
- Review logs and media library history for unusual attachment deletions.
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-862: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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 lookupCVE-2026-5581 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
- Critical
- CVSS
- 9.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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.
SSVC decision data
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:N/UI:N/S:U/C:N/I:H/A:H3.95.2WordfenceVulnerability scoring details
Base CVSS 3.1 score
9.1CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- Source timelineWordfence
Disclosed
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/16dca898-1a98-4e0b-8f48-dc01ba2dc4e6?source=cveCVE reference, Wordfence
- https://plugins.trac.wordpress.org/browser/gf-multi-uploader/tags/1.1.8/inc/GFMUHandlePluploader.class.php#L66CVE reference, Wordfence
- https://plugins.trac.wordpress.org/browser/gf-multi-uploader/trunk/inc/GFMUHandlePluploader.class.php#L66CVE reference, Wordfence
- https://plugins.trac.wordpress.org/browser/gf-multi-uploader/tags/1.1.8/GFMUAddon.class.php#L131CVE reference, Wordfence
- https://plugins.trac.wordpress.org/browser/gf-multi-uploader/trunk/GFMUAddon.class.php#L131CVE reference, Wordfence
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3501985%40gf-multi-uploader%2Ftrunk&old=3421317%40gf-multi-uploader%2Ftrunk&sfp_email=&sfph_mail=CVE reference, Wordfence
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.
Missing Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.