CVE-2023-45281Public exploitNetwork attack vector

Session cookie theft via missing cookie flags

Published Oct 19, 2023 · Updated Aug 2, 2024

Session-cookie exposure in Yamcs 5.8.6 allows remote attackers to steal access and refresh tokens through an uploaded HTML file. The bucket storage feature serves attacker-uploaded HTML in a user's browser, while the cookie configuration leaves both tokens readable to its JavaScript. A user must open the uploaded file; the script can exfiltrate the tokens and enable session hijacking.

CVSS severity6.1
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Session-cookie exposure in Yamcs 5.8.6 allows remote attackers to steal access and refresh tokens through an uploaded HTML file. The bucket storage feature serves attacker-uploaded HTML in a user's browser, while the cookie configuration leaves both tokens readable to its JavaScript. A user must open the uploaded file; the script can exfiltrate the tokens and enable session hijacking.

The record

CVE
CVE-2023-45281
Published
Oct 19, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1539
Attack vector
network
Privileges
unauthenticated

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

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1GitLab Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1539Steal Web Session Cookie

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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