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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.

PUBLISHED Reserved 2026-07-09 | Published 2026-07-10 | Updated 2026-07-10 | Assigner VulDB




MEDIUM: 4.8CVSS: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
LOW: 2.4CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C
LOW: 2.4CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C
3.3AV:N/AC:L/Au:M/C:N/I:P/A:N/E:POC/RL:OF/RC:C

Problem types

Cross Site Scripting

Code Injection

Timeline

2026-07-09:Advisory disclosed
2026-07-09:VulDB entry created
2026-07-09:VulDB entry last update

Credits

rekczh (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/submit/853060 exploit

vuldb.com/vuln/377263 (VDB-377263 | MyEMS Admin Backend svg.py on_post cross site scripting) vdb-entry technical-description

vuldb.com/vuln/377263/cti (VDB-377263 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/cve/CVE-2026-15321 (CVE-2026-15321 | CVE Analysis and Report) third-party-advisory

vuldb.com/submit/853060 (Submit #853060 | MyEMS <=6.4.0 Cross Site Scripting) third-party-advisory

github.com/MyEMS/myems/issues/412 exploit issue-tracking

github.com/...ommit/4a97edfbd786c779d0322054833b21ddf54d5b06 patch

github.com/MyEMS/myems/releases/tag/v6.5.0 patch

github.com/MyEMS/myems/ product

cve.org (CVE-2026-15321)

nvd.nist.gov (CVE-2026-15321)

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