Security readout for executives and security teams
Plain-English summary
NewsPlugin for WordPress allowed website changes to be triggered without proper request validation, enabling stored malicious script injection in affected versions up to 1.0.18. A successful attack could compromise visitors or administrators, alter site content, or damage trust. It requires user interaction, but the impact is high if the plugin is present.
Executive priority
Prioritize remediation where NewsPlugin is installed on public WordPress sites. The business risk is site compromise through stored script injection, with possible account theft, defacement, or visitor impact. Urgency is high for exposed sites, but the supplied sources do not prove active exploitation.
Technical view
CVE-2021-34631 is a CSRF in handle_save_style in ~/news-plugin.php leading to stored XSS. It is scored CVSS 3.1 8.8 with network attack vector, low complexity, no privileges, and required user interaction. The source identifies NewsPlugin versions up to and including 1.0.18. No CPEs are provided.
Likely exposure
Public WordPress sites running NewsPlugin up to and including 1.0.18 are the relevant exposure set. Sites without this plugin, or with a demonstrably unaffected version, are not indicated as exposed by the supplied sources. The bundle does not provide install base, CPEs, or hosting-specific indicators.
Exploitation context
The CVE is not listed as KEV in the supplied bundle, and no cited source states active exploitation. The attack class requires tricking a user into triggering an unauthorized action, with the result stored in the WordPress site. Treat internet-facing WordPress administration workflows as the primary concern.
Researcher notes
The core issue is CSRF in handle_save_style enabling stored XSS. The supplied data names CWE-352 and CVSS 8.8, but does not include patch version, exploit telemetry, CPE mapping, or detailed code context. Validate exposure by installed plugin and version rather than product-family assumptions.
Mitigation direction
- Identify whether NewsPlugin is installed on WordPress sites.
- Remove the plugin if it is not business-critical.
- Check vendor or Wordfence guidance for a fixed or unaffected version.
- Prioritize remediation for public sites and privileged administrator users.
- Review WordPress administrator accounts for suspicious activity.
Validation and detection
- Inventory WordPress plugins and confirm NewsPlugin version numbers.
- Flag NewsPlugin versions up to and including 1.0.18.
- Review pages or settings managed by NewsPlugin for unexpected scripts.
- Check web and WordPress logs for suspicious administrator-triggered changes.
- Confirm compensating controls do not rely on unsupported assumptions.
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-352: 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-2021-34631 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
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/vulnerability-advisories/#CVE-2021-34631CVE 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.
Cross-Site Request Forgery (CSRF)
Cross-Site Request Forgery (CSRF) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.