CVE-2025-40705Network attack vector

Session-cookie theft via unvalidated acquisition names

Published Aug 29, 2025 · Updated Aug 29, 2025

Stored cross-site scripting in OpenAtlas 8.9.0 allows remote authenticated users to steal session cookies through a crafted acquisition name. The /insert/acquisition handler inadequately validates the name POST parameter, allowing attacker-controlled script content to execute when the crafted entry is viewed. An authenticated account must submit the payload, and another authenticated user must view the affected content for browser-session data to be exposed.

CVSS severity5.1
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in OpenAtlas 8.9.0 allows remote authenticated users to steal session cookies through a crafted acquisition name. The /insert/acquisition handler inadequately validates the name POST parameter, allowing attacker-controlled script content to execute when the crafted entry is viewed. An authenticated account must submit the payload, and another authenticated user must view the affected content for browser-session data to be exposed.

The record

CVE
CVE-2025-40705
Published
Aug 29, 2025
Updated
Aug 29, 2025
Vendor
Austrian Centre for Digital Humanities and Cultural Heritage
Product
OpenAtlas
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 29, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 29, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=8.9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Austrian Centre for Digital Humanities and Cultural Heritage · OpenAtlasversion=8.9.0

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.1INCIBECVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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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