Security readout for executives and security teams
Plain-English summary
A logged-in WordPress user with gallery editing access could store malicious script through FooGallery's Custom CSS field. The script may run later on pages embedding that gallery. This can affect site users or administrators who view the page, but the sources do not show unauthenticated exploitation or active exploitation.
Executive priority
Treat as a targeted website integrity risk, not an emergency internet-wide issue. Prioritize remediation where many users can edit galleries or where administrators regularly view gallery pages.
Technical view
CVE-2021-24357 is a CWE-79 stored XSS in the FooGallery WordPress plugin before 2.0.35. The gallery Custom CSS field was not properly sanitized or validated before output on embedded gallery pages. No CVSS score is provided in the source bundle.
Likely exposure
Exposure is limited to WordPress sites running FooGallery before 2.0.35, especially where non-admin authenticated users can create or edit galleries and set Custom CSS.
Exploitation context
The bundle indicates authenticated stored XSS. An attacker would need access to modify a gallery's Custom CSS field. KEV is false, and no provided source states active exploitation in the wild.
Researcher notes
The main evidence is WPScan and CVE metadata. The affected boundary is described as before 2.0.35. The bundle lacks CVSS details, exploit maturity evidence, and deeper privilege requirements.
Mitigation direction
- Update FooGallery to version 2.0.35 or later.
- Restrict gallery editing permissions to trusted users.
- Review vendor guidance and plugin changelog for any additional hardening.
- Remove untrusted Custom CSS from existing galleries.
Validation and detection
- Inventory WordPress sites for the FooGallery plugin version.
- Confirm no installation is running FooGallery before 2.0.35.
- Review gallery Custom CSS fields for unexpected script-like content.
- Check whether untrusted users have gallery editing permissions.
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-2021-24357 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://wpscan.com/vulnerability/950f46ae-4476-4969-863a-0e55752953b3CVE reference · x_refsource_CONFIRM
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.