Security readout for executives and security teams
Plain-English summary
CVE-2021-34629 affects the SendGrid WordPress plugin up to and including 1.11.8. An authenticated WordPress user could export statistics for a WordPress multisite main site without proper authorization. The documented impact is limited confidentiality exposure, not site takeover or service disruption.
Executive priority
Treat as a moderate-priority WordPress governance issue. It is not described as actively exploited or destructive, but it can expose operational statistics to authenticated users who should not have them. Prioritize environments with multisite, many users, or open registration.
Technical view
The issue is an authorization bypass in get_ajax_statistics in lib/class-sendgrid-statistics.php. It maps to CWE-862 and CVSS 3.1 score 4.3: network reachable, low complexity, low privileges required, no user interaction, confidentiality impact only.
Likely exposure
Exposure is most relevant to WordPress multisite environments running the SendGrid plugin version 1.11.8 or earlier, especially where many users have authenticated accounts. The provided sources do not establish exposure for unrelated SendGrid products or non-WordPress deployments.
Exploitation context
The source bundle does not cite active exploitation, and the CVE is not listed as KEV. Exploitation requires an authenticated WordPress account, reducing broad internet risk but increasing concern for sites with open registration, shared user bases, or weak account governance.
Researcher notes
Evidence is limited to CVE metadata and the Wordfence advisory reference. The sources identify the vulnerable function, affected version range, authorization bypass class, and CVSS vector, but do not provide a named fixed version, patch details, or confirmed exploitation.
Mitigation direction
- Inventory WordPress sites for the SendGrid plugin version.
- Upgrade beyond affected versions if vendor guidance provides a fixed release.
- Disable or remove the plugin where it is not required.
- Restrict authenticated account creation and review least-privilege roles.
- Check Wordfence and vendor guidance for current remediation details.
Validation and detection
- Confirm whether WordPress multisite is enabled.
- Verify whether SendGrid plugin version is 1.11.8 or earlier.
- Review who has authenticated access to affected WordPress sites.
- Check logs for unusual SendGrid statistics export activity.
- Document remediation status for each affected site.
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-862: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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 lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-34629 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
- 4.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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:N/S:U/C:L/I:N/A:N2.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/vulnerability-advisories/#CVE-2021-34629CVE 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.
Missing Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.