Security readout for executives and security teams
Plain-English summary
CVE-2021-24319 affects the Bello WordPress directory/listing theme before 1.6.0. A logged-in user could cause script content in a listing excerpt to be rendered in the account listing endpoint, creating XSS risk for users who view that page.
Executive priority
Prioritize remediation if Bello is installed and customer, vendor, or subscriber accounts can create listings. Otherwise, treat as a targeted cleanup item with moderate urgency.
Technical view
The theme failed to sanitize the post_excerpt parameter before output on shop/my-account/bello-listing-endpoint/. The issue is classified as CWE-79 and described as authenticated XSS, with an advisory also referencing XFS. No CVSS vector is provided in the source bundle.
Likely exposure
Exposure is limited to WordPress sites using the Bello - Directory & Listing theme before 1.6.0, especially where untrusted users can authenticate and create or modify listing content.
Exploitation context
The bundle includes public advisories, but it does not show CISA KEV listing, active exploitation, or mass exploitation evidence. Treat exploitability as plausible for authenticated users, not confirmed in the wild.
Researcher notes
Evidence is narrow but clear: unsanitized post_excerpt output at a specific account endpoint. The source bundle does not provide CVSS, detailed exploit prerequisites beyond authentication, or confirmed vendor remediation notes beyond the before-1.6.0 version boundary.
Mitigation direction
- Upgrade Bello theme to 1.6.0 or later if vendor guidance confirms availability.
- Check BoldThemes and WPScan guidance for current fixed versions and instructions.
- Restrict who can create or edit listing excerpts until patched.
- Review account and listing workflows for untrusted authenticated contributors.
- Consider CSP and frame-control headers as defense-in-depth, not replacement fixes.
Validation and detection
- Inventory WordPress sites for the Bello theme and installed version.
- Confirm whether shop/my-account/bello-listing-endpoint/ exists on affected sites.
- Review roles allowed to submit or edit listing excerpt content.
- Check recent listing excerpt changes from low-trust authenticated users.
- After update, verify the theme version is no longer before 1.6.0.
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-2021-24319 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/2c274eb7-25f1-49d4-a2c8-8ce8cecebe68CVE reference · x_refsource_CONFIRM
- https://m0ze.ru/vulnerability/%5B2021-03-21%5D-%5BWordPress%5D-%5BCWE-1021%5D-Bello-WordPress-Theme-v1.5.9.txtCVE reference · x_refsource_MISC
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.