Security readout for executives and security teams
Plain-English summary
Magic Post Voice for WordPress versions up to 1.2 has reflected XSS in an ids parameter. A user would need to interact with a crafted link or request, but successful exploitation could run attacker-controlled script in that user's browser. The public sources rate this medium, not a business-wide emergency.
Executive priority
Treat as a moderate-priority WordPress plugin exposure. Prioritize internet-facing WordPress sites, privileged user workflows, and sites where browser compromise could affect sensitive content or administrative sessions.
Technical view
CVE-2021-39315 is CWE-79 reflected cross-site scripting in ~/inc/admin/main.php through ids. CVSS 3.1 is 6.1, AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. Sources identify affected versions up to and including 1.2; they do not name a fixed release in the provided bundle.
Likely exposure
Exposure is limited to WordPress sites running Magic Post Voice version 1.2 or earlier. The bundle does not provide installation counts, fixed-version data, or evidence that other products are affected.
Exploitation context
The CVSS vector requires user interaction and indicates network reachability, low attack complexity, changed scope, and limited confidentiality and integrity impact. The bundle says KEV is false and provides no cited evidence of active exploitation.
Researcher notes
Evidence is narrow but consistent: reflected XSS through ids in the plugin admin file, affected through version 1.2, CVSS 6.1. The supplied sources do not establish a patch level, exploit availability, or exploitation in the wild.
Mitigation direction
- Inventory WordPress sites for Magic Post Voice installations.
- Remove or disable the plugin where it is not business-required.
- Check Wordfence, WordPress plugin sources, and vendor guidance for a fixed release.
- Update the plugin if a vendor-supported fixed version is available.
- Apply compensating controls for untrusted links targeting affected WordPress users.
Validation and detection
- Confirm whether Magic Post Voice is installed on each WordPress site.
- Record the installed plugin version and flag versions 1.2 or earlier.
- Verify whether a vendor-supported update is available from trusted sources.
- Confirm remediation by documenting update, removal, or accepted exception.
- Review relevant security logs for suspicious requests involving the plugin parameter.
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-2021-39315 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
- 6.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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 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:N/UI:R/S:C/C:L/I:L/A:N2.82.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.1MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39315CVE reference · x_refsource_MISC
- https://plugins.trac.wordpress.org/browser/magic-post-voice/trunk/inc/admin/main.php#L14CVE 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.