Security readout for executives and security teams
Plain-English summary
Business Hours Indicator, a WordPress plugin, allowed a logged-in user to save unsafe content in the “Now closed message” setting. That content could run as script when viewed in the admin area or public site, creating stored cross-site scripting risk.
Executive priority
Treat this as a moderate website integrity issue. Prioritize remediation on public-facing WordPress sites and sites with multiple content or plugin administrators.
Technical view
CVE-2021-24593 is CWE-79 stored XSS caused by missing sanitization or escaping of the “Now closed message” setting in Business Hours Indicator before 2.3.5. Sources state the unsafe value is output in both backend and frontend contexts. Required role or capability is not specified.
Likely exposure
Exposure is likely limited to WordPress sites running Business Hours Indicator before 2.3.5, especially where multiple authenticated users can manage plugin settings. Exact privilege requirements are not stated in the provided sources.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. Exploitation requires authenticated access and ability to save the affected setting, but the necessary WordPress role is not documented in the supplied evidence.
Researcher notes
The key evidence is limited but consistent: stored XSS in a plugin setting, fixed by the 2.3.5 boundary. No CVSS vector, detailed affected role, exploit status, or deeper patch notes are provided in the bundle.
Mitigation direction
- Update Business Hours Indicator to version 2.3.5 or later.
- Restrict plugin settings access to trusted administrators.
- Review the “Now closed message” setting for unexpected HTML or script-like content.
- Check vendor and WPScan guidance for any later advisories.
Validation and detection
- Inventory WordPress sites for Business Hours Indicator installations.
- Confirm installed plugin versions are 2.3.5 or later.
- Verify who can edit the affected plugin setting.
- Review recent changes to the “Now closed message” setting.
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-2021-24593 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/309296d4-c397-4fc7-85fb-a28b5b5b6a8dCVE 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.