Security readout for executives and security teams
Plain-English summary
This is a cross-site scripting issue in the WordPress Photo Gallery by Supsystic plugin. A highly privileged user could introduce unsafe content that runs in another user’s browser after interaction. Business risk is moderate because exploitation appears constrained, but affected public WordPress sites should still review exposure.
Executive priority
Treat as a scheduled remediation item, not an emergency, unless the plugin is widely deployed on customer-facing WordPress sites or high-privilege accounts are weakly controlled.
Technical view
CVE-2024-29921 is CWE-79 improper input neutralization during page generation in gallery-by-supsystic through version 1.15.16. CVSS 3.1 is 5.9 with network access, low complexity, high privileges, required user interaction, changed scope, and low confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to WordPress installations using Photo Gallery by Supsystic, package gallery-by-supsystic, at versions described as through 1.15.16. Sites without this plugin are not indicated as affected by the provided sources.
Exploitation context
The source bundle does not show CISA KEV listing or other evidence of active exploitation. The CVSS vector indicates an authenticated high-privilege actor and user interaction are required, reducing broad opportunistic risk compared with unauthenticated XSS.
Researcher notes
The bundle’s description states affected versions through 1.15.16, while the structured affected version field lists “0,” so version interpretation should be verified against vendor or Patchstack records. No exploit details, patch version, or active exploitation evidence are provided.
Mitigation direction
- Inventory WordPress sites for the gallery-by-supsystic plugin.
- Confirm whether installed versions are 1.15.16 or earlier.
- Check vendor or Patchstack guidance for patched version information.
- Disable or remove the plugin where business need is low.
- Restrict high-privilege WordPress access to trusted administrators only.
- Monitor affected sites for unexpected script content or page changes.
Validation and detection
- Review WordPress plugin inventory for Photo Gallery by Supsystic.
- Record installed plugin versions across production and staging.
- Confirm whether vendor guidance identifies a fixed release.
- Check administrator and gallery-management role assignments.
- Review recent content changes for unexpected script-bearing entries.
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-2024-29921 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
- 5.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/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.
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:H/UI:R/S:C/C:L/I:L/A:L1.73.7PatchstackVulnerability scoring details
Base CVSS 3.1 score
5.9MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L
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.
- 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://patchstack.com/database/Wordpress/Plugin/gallery-by-supsystic/vulnerability/wordpress-photo-gallery-by-supsystic-plugin-1-15-16-cross-site-scripting-xss-vulnerability?_s_id=cveCVE reference, Patchstack · vdb-entry
- https://patchstack.com/database/vulnerability/gallery-by-supsystic/wordpress-photo-gallery-by-supsystic-plugin-1-15-16-cross-site-scripting-xss-vulnerability?_s_id=cveCVE reference, CVE · vdb-entry, x_transferred
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.