Security readout for executives and security teams
Plain-English summary
This affects WordPress sites using the weDevs WP Project Manager plugin version 2.4.13 or older. An authenticated user with project access could store malicious script content that runs when another user views it. Business impact is mainly account/session risk and content manipulation within the WordPress admin or site context.
Executive priority
Treat as a moderate-priority web application risk. Prioritize sites with public registration, many low-privilege users, or sensitive admin activity. The issue is not described as actively exploited, but stored XSS can create meaningful account and data exposure if ignored.
Technical view
CVE-2021-36826 is an authenticated stored XSS in WP Project Manager <= 2.4.13. The CVSS 3.1 score is 5.4: network reachable, low complexity, low privileges required, user interaction required, changed scope, low confidentiality and integrity impact, no availability impact.
Likely exposure
Exposure is limited to WordPress deployments running weDevs WP Project Manager <= 2.4.13, especially where subscribers or other low-privilege users can access project features. Sites without the plugin, without affected versions, or without low-privilege project access are less likely to be exposed.
Exploitation context
The source bundle does not report active exploitation, and this CVE is not marked as KEV. Exploitation requires an authenticated user with project access and a victim viewing stored content. Evidence in the bundle does not identify public exploit use or a specific fixed version.
Researcher notes
Key uncertainty is remediation detail: the provided bundle names affected versions but does not state a fixed version or vendor workaround. Validation should focus on installed plugin version, project access controls, and whether untrusted authenticated users can create stored project content.
Mitigation direction
- Inventory WordPress sites for the WP Project Manager plugin and installed version.
- Check vendor, WordPress plugin, or Patchstack guidance for the fixed release before upgrading.
- Restrict project access to trusted users until remediation is complete.
- Disable or remove the plugin where it is unnecessary or cannot be remediated promptly.
- Review project content and users for suspicious low-privilege activity.
Validation and detection
- Confirm whether WP Project Manager is installed on each WordPress site.
- Verify whether the installed version is 2.4.13 or older.
- Review which roles can access project functionality, especially subscriber-level accounts.
- Check security advisories or changelogs for remediation details.
- Look for unexpected script-like content in project records and audit logs.
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-2021-36826 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
- 5.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/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:L/UI:R/S:C/C:L/I:L/A:N2.32.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Source materials
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.