Security readout for executives and security teams
Plain-English summary
This vulnerability affects a WordPress iframe shortcode plugin and can let a logged-in contributor-level user store malicious script content. A victim must later view affected content for impact. The business risk is moderate: it depends on plugin presence, user permissions, and victim interaction, but stored XSS can affect users across sessions.
Executive priority
Treat as a moderate-priority WordPress exposure. Address promptly on public or multi-author sites, especially where lower-privileged users can publish or draft content viewed by staff or administrators.
Technical view
CVE-2023-29436 is authenticated contributor+ stored XSS in Flyn San IFrame Shortcode plugin versions up to 1.0.5. It is classified as CWE-79 with CVSS 3.1 score 6.5, requiring low attack complexity, low privileges, and user interaction with changed scope.
Likely exposure
Exposure appears limited to WordPress sites running Flyn San IFrame Shortcode <= 1.0.5, especially where contributor-level accounts can create or edit content using the plugin.
Exploitation context
The source bundle does not report active exploitation, and the CVE is not listed as KEV. Exploitation requires an authenticated contributor-or-higher user and a separate user viewing affected stored content.
Researcher notes
Evidence is sparse beyond CVE metadata and Patchstack’s entry. Do not assume unauthenticated exploitation, broad product impact, or a specific fixed version unless confirmed by vendor or advisory data.
Mitigation direction
- Inventory WordPress sites for the IFrame Shortcode plugin and installed version.
- Check vendor or Patchstack guidance for a fixed version or recommended mitigation.
- Restrict contributor-level content privileges where the plugin remains installed.
- Prioritize update, replacement, or removal if no supported fixed version is available.
Validation and detection
- Confirm whether flynsarmy-iframe-shortcode is installed on each WordPress site.
- Record the plugin version and compare it with the <= 1.0.5 affected range.
- Review contributor, author, editor, and administrator account assignments.
- Check content workflows for iframe shortcode use and untrusted authors.
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-2023-29436 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
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
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:R/S:C/C:L/I:L/A:L2.33.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Source materials
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.