Security readout for executives and security teams
Plain-English summary
CVE-2026-2383 affects the WordPress Simple Download Monitor plugin through version 4.0.5. A logged-in user with Contributor-level access or higher could store malicious script in a custom field. That script may run when someone views the affected page, potentially exposing session data or altering page behavior.
Executive priority
Prioritize remediation for public WordPress sites with multiple content contributors. This is not rated critical, but stored XSS can affect visitors and administrators, creating business risk if abused through a compromised or malicious low-privilege account.
Technical view
This is a stored cross-site scripting issue caused by insufficient input sanitization and output escaping in Simple Download Monitor custom field handling. The CVSS 3.1 score is 6.4. It requires low-privileged authenticated access, has network attack vector, changes scope, and can impact confidentiality and integrity. Availability impact is not identified.
Likely exposure
Exposure is limited to WordPress sites running Simple Download Monitor version 4.0.5 or earlier, especially where Contributor or higher accounts are assigned to untrusted users, contractors, or compromised accounts.
Exploitation context
The source bundle does not indicate known active exploitation, and KEV is false. Exploitation requires authenticated access at Contributor level or above, reducing broad internet-scale risk but increasing concern for multi-author sites or compromised accounts.
Researcher notes
The CVE record identifies CWE-79 and CVSS 6.4. The affected-product metadata in the bundle appears sparse, but the narrative clearly states Simple Download Monitor through 4.0.5. Use the Wordfence advisory and WordPress Trac references to confirm code-level changes and fixed-version guidance.
Mitigation direction
- Check whether Simple Download Monitor is installed and identify its version.
- Update beyond version 4.0.5 if a fixed release is available from the vendor.
- Review vendor and WordPress plugin guidance for the official fix status.
- Restrict Contributor and higher roles to trusted users only.
- Review recent content changes by Contributor-level users on affected sites.
Validation and detection
- Inventory WordPress sites for Simple Download Monitor installations.
- Confirm whether installed versions are 4.0.5 or earlier.
- Review user roles for Contributor, Author, Editor, and Administrator accounts.
- Check plugin changelog or Trac changeset for sanitization and escaping changes.
- Inspect recent download-related content for unexpected scripts or suspicious custom fields.
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-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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-2026-2383 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
- Medium
- CVSS
- 6.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
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:C/C:L/I:L/A:N3.12.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/556e41d1-2c98-4175-87ba-29689704c2f0?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/simple-download-monitor/tags/4.0.3/sdm-shortcodes.php#L543CVE reference
- https://plugins.trac.wordpress.org/browser/simple-download-monitor/trunk/sdm-shortcodes.php#L543CVE reference
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3464024%40simple-download-monitor%2Ftrunk&old=3430786%40simple-download-monitor%2Ftrunk&sfp_email=&sfph_mail=CVE 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 Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.