CVE-2023-45279Public exploitNetwork attack vector

Cross-user JavaScript execution via unfiltered display scripts

Published Oct 19, 2023 · Updated Aug 2, 2024

Stored XSS in Yamcs 5.8.6 allows remote authenticated users to execute JavaScript in another user's browser via a crafted display. A bucket accepts an OPI display that references an uploaded JavaScript file, and the Telemetry display renderer executes the script without filtering or confinement. A user must open the attacker-supplied display; execution occurs in the Yamcs web context and can expose or alter browser-accessible session data.

CVSS severity5.4
Medium
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Yamcs 5.8.6 allows remote authenticated users to execute JavaScript in another user's browser via a crafted display. A bucket accepts an OPI display that references an uploaded JavaScript file, and the Telemetry display renderer executes the script without filtering or confinement. A user must open the attacker-supplied display; execution occurs in the Yamcs web context and can expose or alter browser-accessible session data.

The record

CVE
CVE-2023-45279
Published
Oct 19, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1204.002, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 19, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.002Malicious File
T1059.007JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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