Security readout for executives and security teams
Plain-English summary
This issue affects the WordPress Social Share Buttons by Supsystic plugin through version 2.2.2. A malicious site could potentially cause a logged-in WordPress user to make unintended plugin-related changes. The published severity is medium, with limited integrity impact and required user interaction.
Executive priority
Treat as a moderate-priority WordPress hygiene issue. It is not described as actively exploited, but affected plugins on public sites should be removed, disabled, or updated once a trusted fixed version is confirmed.
Technical view
CVE-2021-36890 is a CWE-352 CSRF vulnerability in Social Share Buttons by Supsystic <= 2.2.2. The CVSS 3.1 vector is AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N, meaning remote reachability, low attack complexity, required user interaction, and low integrity impact only.
Likely exposure
Exposure is limited to WordPress sites with the Social Share Buttons by Supsystic plugin installed at version 2.2.2 or earlier. Sites not using this plugin are not indicated as affected by the provided sources.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The CVSS vector indicates user interaction is required. Public details provided here do not describe exploit mechanics, affected actions, or confirmed real-world abuse.
Researcher notes
The provided evidence establishes product, version range, CWE, and CVSS characteristics, but not specific vulnerable endpoints, exploit details, or fixed version. Avoid assuming broader Supsystic products are affected without separate evidence.
Mitigation direction
- Inventory WordPress sites for this plugin and its installed version.
- Disable or remove the plugin where version is 2.2.2 or earlier.
- Check vendor and Patchstack guidance for a confirmed fixed release.
- Prioritize remediation on administrator-managed or high-traffic WordPress sites.
Validation and detection
- Confirm whether the plugin slug is installed on each WordPress site.
- Verify the installed version is not 2.2.2 or earlier.
- Review WordPress administrative change history for unexpected plugin setting changes.
- Document compensating action if no vendor-confirmed fixed version is available.
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-2021-36890 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:N/UI:R/S:U/C:N/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:U/C:N/I:L/A:N2.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://wordpress.org/plugins/social-share-buttons-by-supsystic/CVE reference · x_refsource_CONFIRM
- https://patchstack.com/database/vulnerability/social-share-buttons-by-supsystic/wordpress-social-share-buttons-by-supsystic-plugin-2-2-2-cross-site-request-forgery-csrf-vulnerabilityCVE reference · x_refsource_CONFIRM
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.