Security readout for executives and security teams
Plain-English summary
JobBoardWP for WordPress allowed a logged-in administrator to store malicious script content through plugin fields. The main business risk is compromise of visitors or administrators who later view affected pages or admin screens, but the attacker already needs high privileges.
Executive priority
Treat as a moderate cleanup and hardening item, not an emergency, unless affected sites have many delegated administrators or recent admin-account compromise indicators.
Technical view
CVE-2021-39329 is stored cross-site scripting in JobBoardWP versions up to and including 1.0.7, tied to insufficient validation and sanitization in admin metabox parameters. It is CVSS 5.5, CWE-79, network-reachable, low complexity, high-privilege, and scope-changing.
Likely exposure
Exposure is limited to WordPress sites using JobBoardWP <= 1.0.7, especially multisite or other configurations where unfiltered_html is disabled for administrators. Sites without this plugin are not affected based on the provided sources.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. Exploitation requires authenticated administrative access, so this is more likely relevant after account compromise, malicious insider activity, or delegated-admin environments.
Researcher notes
The record identifies stored XSS in includes/admin/class-metabox.php parameters but does not provide a source-confirmed fixed version. Avoid assuming broad unauthenticated exposure; the stated prerequisite is administrative user access.
Mitigation direction
- Inventory WordPress sites for JobBoardWP and confirm installed versions.
- Check vendor or WordPress plugin guidance for a fixed release before upgrading.
- Remove or disable JobBoardWP where it is not operationally required.
- Limit administrator access to trusted users with strong authentication.
- Review multisite configurations where unfiltered_html is disabled.
Validation and detection
- Confirm whether JobBoardWP version is 1.0.7 or earlier.
- Verify whether unfiltered_html is disabled for administrators.
- Review JobBoardWP admin-managed fields for unexpected script content.
- Check WordPress admin accounts for unnecessary or stale privileges.
- Monitor affected sites for unusual administrator content changes.
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-2021-39329 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
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/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:H/UI:N/S:C/C:L/I:L/A:N2.32.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39329CVE reference · x_refsource_MISC
- https://github.com/BigTiger2020/word-press/blob/main/JobBoardWP%20%E2%80%93%20Job%20Board%20Listings%20and%20Submissions.mdCVE reference · x_refsource_MISC
- https://plugins.trac.wordpress.org/browser/jobboardwp/trunk/includes/admin/class-metabox.php#L165CVE 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.