CVE-2025-40707Network attack vector

Session cookie theft via unvalidated place fields

Published Aug 29, 2025 · Updated Aug 29, 2025

Stored XSS in Austrian Centre for Digital Humanities and Cultural Heritage OpenAtlas 8.9.0 allows remote authenticated users to steal session cookies. The /insert/place handler inadequately validates the name and alias-0 POST parameters before their values reach authenticated users' browsers. Exploitation requires an authenticated user to process a crafted query, and successful script execution exposes that user's session cookie and permits actions in that session.

CVSS severity5.4
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 XSS in Austrian Centre for Digital Humanities and Cultural Heritage OpenAtlas 8.9.0 allows remote authenticated users to steal session cookies. The /insert/place handler inadequately validates the name and alias-0 POST parameters before their values reach authenticated users' browsers. Exploitation requires an authenticated user to process a crafted query, and successful script execution exposes that user's session cookie and permits actions in that session.

The record

CVE
CVE-2025-40707
Published
Aug 29, 2025
Updated
Aug 29, 2025
Vendor
Austrian Centre for Digital Humanities and Cultural Heritage
Product
OpenAtlas
Classifications
CWE-79, T1539
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

5.4National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.1Spanish National Cybersecurity Institute, S.A. (INCIBE)CVSS: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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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