Security readout for executives and security teams
Plain-English summary
This vulnerability affects the Chaty WordPress plugin when version 2.8.3 or earlier is installed. An already highly privileged user could store malicious script content that later runs in another user’s browser. The business risk is reduced by the admin-level requirement, but exposed WordPress sites should still update because stored XSS can undermine trust and session security.
Executive priority
Treat this as a moderate-priority WordPress maintenance issue. It is not reported as actively exploited in the provided sources, but any public site running an affected plugin version should be updated promptly and administrator access reviewed.
Technical view
CVE-2021-36846 is an authenticated stored cross-site scripting issue in Premio Chaty for WordPress, affecting versions up to 2.8.3. The CVSS v3.1 score is 4.8 with high privileges required, user interaction required, changed scope, low confidentiality impact, and low integrity impact.
Likely exposure
Exposure is limited to WordPress sites running the Premio Chaty plugin at version 2.8.3 or earlier. The source bundle does not identify affected hosted services, CPEs, or non-WordPress products.
Exploitation context
The CVE record does not indicate CISA KEV listing, and the provided sources do not claim active exploitation. Exploitation requires an authenticated admin-or-higher role and user interaction, which lowers likelihood but does not remove risk on shared or compromised administrator accounts.
Researcher notes
Evidence is narrow but consistent: the issue is CWE-79 stored XSS in Chaty <=2.8.3 with PR:H and UI:R. The supplied bundle does not provide payload details, fixed-version text, proof of exploitation, or vendor remediation notes beyond the affected version range.
Mitigation direction
- Inventory WordPress sites for the Chaty plugin and installed version.
- Update Chaty according to WordPress or vendor guidance for versions after 2.8.3.
- Restrict administrator access to trusted users with strong authentication.
- Review Chaty settings for unexpected script-like content or unauthorized changes.
- If updating is unavailable, evaluate disabling Chaty until vendor guidance is applied.
Validation and detection
- Confirm whether Chaty is installed on each WordPress site.
- Record the installed Chaty version and compare it with the affected range.
- Check administrator accounts for stale, shared, or unnecessary access.
- Review recent Chaty configuration changes for suspicious stored content.
- Verify remediation against the CVE and Patchstack advisory references.
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-2021-36846 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
- 4.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/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:H/UI:R/S:C/C:L/I:L/A:N1.72.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.8MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://wordpress.org/plugins/chaty/CVE reference · x_refsource_CONFIRM
- https://patchstack.com/database/vulnerability/chaty/wordpress-chaty-plugin-2-8-3-authenticated-stored-cross-site-scripting-xss-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.
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.