Security readout for executives and security teams
Plain-English summary
RentPress for WordPress, through version 6.6.4, has a reflected cross-site scripting issue. An attacker could craft a link that runs script in a visitor’s browser if the visitor opens it. This can affect session confidentiality and page integrity, but the provided evidence requires user interaction and does not show active exploitation.
Executive priority
Treat this as a moderate website risk. Prioritize remediation for public WordPress sites that use RentPress, especially customer-facing properties, but it is not supported as an emergency active-exploitation case by the provided evidence.
Technical view
The source bundle attributes CVE-2021-38323 to unsanitized handling of the selections parameter in src/rentPress/AjaxRequests.php. The CVSS 3.1 score is 6.1 with network access, low complexity, no privileges, required user interaction, changed scope, and low confidentiality and integrity impact.
Likely exposure
Exposure is limited to WordPress sites running the RentPress plugin at versions up to and including 6.6.4. The bundle does not identify other affected products, CPEs, or hosted-service exposure.
Exploitation context
The CVE is not listed as KEV in the provided bundle. Exploitation evidence is limited to the vulnerability description and public references; active exploitation, exploit availability, and mass scanning are not established by these sources.
Researcher notes
Evidence supports CWE-79 reflected XSS in RentPress AjaxRequests.php via selections. The bundle does not provide a named fixed version, patch commit, exploit proof, or KEV status. Avoid expanding scope beyond RentPress <=6.6.4 without additional vendor evidence.
Mitigation direction
- Inventory WordPress sites using RentPress and identify plugin versions.
- Check RentPress or WordPress plugin guidance for a fixed release or vendor mitigation.
- Upgrade RentPress if vendor guidance confirms a secure version.
- Disable or remove RentPress where feasible until remediation is confirmed.
- Warn staff against opening untrusted links targeting affected sites.
Validation and detection
- Confirm whether RentPress version 6.6.4 or earlier is installed.
- Review plugin exposure on public WordPress properties.
- Check web logs for suspicious requests involving the selections parameter.
- Verify remediation by confirming the installed RentPress version after updates.
- Track vendor advisory status for explicit fix guidance.
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-2021-38323 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-2021-38323CVE reference · x_refsource_MISC
- https://plugins.trac.wordpress.org/browser/rentpress/tags/6.6.4/src/rentPress/AjaxRequests.php#L83CVE 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.