Security readout for executives and security teams
Plain-English summary
This affects WordPress sites using the Car Repair Services & Auto Mechanic theme before version 4.0. A public URL parameter could be reflected into a page without proper sanitization, allowing browser-side script execution if a user follows a crafted link.
Executive priority
Treat this as a targeted web risk, not an internet-wide emergency based on the supplied evidence. Patch or replace affected theme installs during the next security maintenance window, faster for sites with authenticated users or administrators likely to browse links.
Technical view
CVE-2021-24335 is a CWE-79 reflected XSS in the theme's serviceestimatekey search parameter. The bundle says unauthenticated input was output back into the page before version 4.0. CVSS is not provided, and the XFS detail is not technically expanded in the supplied evidence.
Likely exposure
Exposure is limited to WordPress installations using this specific theme before 4.0, especially publicly reachable pages that process the serviceestimatekey parameter. Sites not using the theme are not indicated as affected.
Exploitation context
The source bundle does not cite active exploitation, and KEV is false. Reflected XSS commonly requires a victim to open a crafted link or visit a maliciously controlled page, so business risk depends on user targeting and session sensitivity.
Researcher notes
The core issue is source-grounded as reflected XSS in serviceestimatekey. Severity and CVSS are absent. The title mentions XFS, but the provided description only substantiates reflected XSS, so frame-related impact should be validated against the original advisory before reporting.
Mitigation direction
- Confirm whether the theme is installed and publicly reachable.
- Upgrade to version 4.0 or later if vendor guidance supports it.
- Check WPScan and vendor release notes for current remediation guidance.
- Review any custom templates handling serviceestimatekey for output encoding.
- Prioritize admin-facing or customer-authenticated WordPress sites.
Validation and detection
- Inventory WordPress themes and record installed version numbers.
- Check whether public routes accept the serviceestimatekey parameter.
- Use a benign marker in staging to confirm output is encoded.
- Review web logs for unusual serviceestimatekey requests.
- Verify no untrusted parameter value renders as executable HTML or script.
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-2021-24335 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/39258aba-2449-4214-a490-b8e46945117dCVE reference · x_refsource_CONFIRM
- https://themeforest.net/item/car-repair-services-auto-mechanic-wordpress-theme/19823557CVE reference · x_refsource_MISC
- https://m0ze.ru/vulnerability/%5B2021-02-12%5D-%5BWordPress%5D-%5BCWE-79%5D-Car-Repair-Services-WordPress-Theme-v3.9.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.