Security readout for executives and security teams
Plain-English summary
CVE-2021-38336 affects the Edit Comments XT WordPress plugin through version 1.0. A crafted request can cause a victim’s browser to run attacker-supplied script in the site context. The source bundle does not show active exploitation or a named vendor fix.
Executive priority
Handle during normal vulnerability remediation unless the plugin is internet-facing on important WordPress properties. Raise priority if the plugin remains required and no maintained update exists.
Technical view
The plugin reflects $_SERVER["PHP_SELF"] in edit-comments-xt.php without sufficient output handling, creating reflected cross-site scripting. CVSS 3.1 is 6.1, with network access, low complexity, no privileges, required user interaction, changed scope, low confidentiality and integrity impact, and no availability impact.
Likely exposure
Exposure is limited to WordPress sites running Edit Comments XT version 1.0 or earlier. Sites not using this plugin are not indicated as affected by the provided sources.
Exploitation context
The CVE requires user interaction, consistent with reflected XSS. The source bundle marks KEV as false and provides no cited evidence of active exploitation. Do not treat it as actively exploited without additional evidence.
Researcher notes
The key evidence is the CVE description, CVSS vector, Wordfence advisory entry, and WordPress Trac code reference near the vulnerable file. The bundle does not provide exploit telemetry, patch version, or maintainer status.
Mitigation direction
- Inventory WordPress sites for Edit Comments XT version 1.0 or earlier.
- Disable or remove the plugin if it is not required.
- Check Wordfence and WordPress plugin guidance for maintained updates or replacement advice.
- Prioritize replacement if no maintained patched version is available.
Validation and detection
- Confirm whether Edit Comments XT is installed and enabled on each WordPress site.
- Record the installed plugin version and compare it with version 1.0.
- Review deployed plugin code for reflected PHP_SELF use in edit-comments-xt.php.
- Check security logs for suspicious requests targeting the plugin page.
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-2021-38336 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-2021-38336CVE reference · x_refsource_MISC
- https://plugins.trac.wordpress.org/browser/edit-comments-xt/tags/1.0/edit-comments-xt.php#L249CVE 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.