Light Messages <= 1.0 - CSRF to Stored XSS
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Tampering, Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-352 and CWE-79.
Summary
The Light Messages WordPress plugin through 1.0 is lacking CSRF check when updating it's settings, and is not sanitising its Message Content in them (even with the unfiltered_html disallowed). As a result, an attacker could make a logged in admin update the settings to arbitrary values, and set a Cross-Site Scripting payload in the Message Content. Depending on the options set, the XSS payload can be triggered either in the backend only (in the plugin's settings), or both frontend and backend.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | Light Messages | 1.0 – 1.0 | — | No fix listed | CNA |
- Light Messages VendorUnknown Affected 1.0 – 1.0 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:light_messages_project:light_messages:*:*:*:*:*:wordpress:*:* | up to 1.0 | Vulnerable | Light Messages Project |
- cpe:2.3:a:light_messages_project:light_messages:*:*:*:*:*:wordpress:*:* Versions up to 1.0 Vulnerable ·Light Messages Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-24535
- 2026-10-03 Alias added: GHSA-6g8x-82fh-m598
References
Sources
- CVE-2021-24535 · CVE Program
- CVE-2021-24535 · NVD
- FIRST EPSS
- GHSA-6g8x-82fh-m598 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences