CVE-2025-53640: Indico Indico Vulnerability Allows Attackers To Vulnerability

MODERATE
Advisory Identifier: GHSA-q28v-664f-q6wj
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CWE-639 CWE-862 CWE-200
Published
Advisory Summary

CVE-2025-53640 is a MODERATE indico vulnerability allows attackers to vulnerability (CWE-639: Authorization Bypass Through User-Controlled Key) affecting Indico libraries in the PyPI ecosystem. The issue involves indico vulnerability allows attackers to bulk dump user details. Remediation is available by upgrading affected packages to version 3.3.7.

CVE-2025-53640 at a Glance

CVE Identifier CVE-2025-53640
GHSA Identifier GHSA-q28v-664f-q6wj
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-639: Authorization Bypass Through User-Controlled Key
Affected Product Indico
Package Ecosystem PyPI
Published Date
Last Updated

How to Fix CVE-2025-53640

To remediate this vulnerability, upgrade all affected Indico dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

indico fixed: 3.3.7 
pip install indico>=3.3.7
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show indico

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2025-53640, inspect your installed packages using pip:

pip show indico

Analyze the terminal output to locate any version of Indico in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.3.7), your application is affected.

Note: The pip show indico command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-639: Authorization Bypass Through User-Controlled Key, where the system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. In Indico, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact An endpoint used to display details of users listed in certain fields (such as ACLs) could be misused to dump basic user details (such as name, affiliation and email) in bulk. > [!TIP] > If your instance allows everyone to create a user account, and you wish to truly restrict access to these user details, consider restricting user search to managers. You can find details on the newly introduced indico.conf setting [`ALLOW_PUBLIC_USER_SEARCH`](https://docs.getindico.io/en/stable/config/settings/#ALLOW_PUBLIC_USER_SEARCH) in our documentation. ### Patches You should to update to [Indico 3.3.7](https://github.com/indico/indico/releases/tag/v3.3.7) as soon as possible. See [the docs](https://docs.getindico.io/en/stable/installation/upgrade/) for instructions on how to update. ### Workarounds It is possible to restrict access to the affected endpoints (e.g. in the webserver config), but doing so would break certain form fields which could no longer show the details of the users listed in those fields, so upgrading instead is highly recommended. ### For more information If you have any questions or comments about this advisory: - Open a thread in [our forum](https://talk.getindico.io/) - Email us privately at [indico-team@cern.ch](mailto:indico-team@cern.ch) #### Credits This vulnerability was identified during a security assessment conducted as part of the Red Team Residency Program at RNP (Rede Nacional de Ensino e Pesquisa). The research and testing were performed by a security researcher working under RNP’s authorization and coordination. Special acknowledgment goes to the RNP Security Team, which provided the infrastructure, methodology, and ethical oversight for this work.

CVE-2025-53640 Affected Indico Versions

1 component(s)
Fixed Versions:
3.3.7
Product / Package Ecosystem Affected Versions Fixed Version
indico
pypi/indico
PyPI
≥ 2.2
< 3.3.7
3.3.7

References

GitHub Advisory / Wiki ADVISORY
https://github.com/indico/indico/security/advisories/GHSA-q28v-664f-q6wj
NVD — CVE-2025-53640 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-53640
Indico Source Repository REPOSITORY
https://github.com/indico/indico/pull/6936/commits/f8583557a3da56aeea8857ae69bf17c9066c95c1
Indico Security Information SECURITY
https://docs.getindico.io/en/stable/config/settings/#ALLOW_PUBLIC_USER_SEARCH
Indico Security Information SECURITY
https://docs.getindico.io/en/stable/installation/upgrade
Indico Source Repository REPOSITORY
https://github.com/indico/indico
Indico Release RELEASE
https://github.com/indico/indico/releases/tag/v3.3.7
www.vicarius.io/vsociety/posts/cve2... WEB
https://www.vicarius.io/vsociety/posts/cve202553640-detect-indico-vulnerability
www.vicarius.io/vsociety/posts/cve2... WEB
https://www.vicarius.io/vsociety/posts/cve202553640-mitigate-indico-vulnerability

Frequently Asked Questions

What is CVE-2025-53640?
CVE-2025-53640 is a security vulnerability in Indico involving Indico vulnerability allows attackers to bulk dump user details under CWE-639: Authorization Bypass Through User-Controlled Key.
Which Indico versions are affected?
Affected versions include releases prior to 3.3.7 across affected packages: indico.
What version fixes CVE-2025-53640?
Upgrading to 3.3.7 (or the latest patched release for your respective branch) resolves the vulnerability.
Is indico affected?
Yes, indico is affected in releases prior to 3.3.7. Upgrade your dependency to 3.3.7 or later.
What CWE is associated with CVE-2025-53640?
CVE-2025-53640 is classified under CWE-639: Authorization Bypass Through User-Controlled Key (The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.).
How can I check PyPI dependencies for CVE-2025-53640?
Run the dependency tree command: 'pip show indico'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-q28v-664f-q6wj",
  "modified" : "2025-07-22T18:33:40Z",
  "published" : "2025-07-14T19:24:03Z",
  "aliases" : [ "CVE-2025-53640" ],
  "summary" : "Indico vulnerability allows attackers to bulk dump user details",
  "details" : "### Impact\nAn endpoint used to display details of users listed in certain fields (such as ACLs) could be misused to dump basic user details (such as name, affiliation and email) in bulk.\n\n> [!TIP]\n> If your instance allows everyone to create a user account, and you wish to truly restrict access to these user details, consider restricting user search to managers. You can find details on the newly introduced indico.conf setting [`ALLOW_PUBLIC_USER_SEARCH`](https://docs.getindico.io/en/stable/config/settings/#ALLOW_PUBLIC_USER_SEARCH) in our documentation.\n\n### Patches\nYou should to update to [Indico 3.3.7](https://github.com/indico/indico/releases/tag/v3.3.7) as soon as possible.\nSee [the docs](https://docs.getindico.io/en/stable/installation/upgrade/) for instructions on how to update.\n\n### Workarounds\nIt is possible to restrict access to the affected endpoints (e.g. in the webserver config), but doing so would break certain form fields which could no longer show the details of the users listed in those fields, so upgrading instead is highly recommended.\n\n### For more information\nIf you have any questions or comments about this advisory:\n\n- Open a thread in [our forum](https://talk.getindico.io/)\n- Email us privately at [indico-team@cern.ch](mailto:indico-team@cern.ch)\n\n#### Credits\nThis vulnerability was identified during a security assessment conducted as part of the Red Team Residency Program at RNP (Rede Nacional de Ensino e Pesquisa).\nThe research and testing were performed by a security researcher working under RNP’s authorization and coordination.\nSpecial acknowledgment goes to the RNP Security Team, which provided the infrastructure, methodology, and ethical oversight for this work.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "indico"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.2"
      }, {
        "fixed" : "3.3.7"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/indico/indico/security/advisories/GHSA-q28v-664f-q6wj"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-53640"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/indico/indico/pull/6936/commits/f8583557a3da56aeea8857ae69bf17c9066c95c1"
  }, {
    "type" : "WEB",
    "url" : "https://docs.getindico.io/en/stable/config/settings/#ALLOW_PUBLIC_USER_SEARCH"
  }, {
    "type" : "WEB",
    "url" : "https://docs.getindico.io/en/stable/installation/upgrade"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/indico/indico"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/indico/indico/releases/tag/v3.3.7"
  }, {
    "type" : "WEB",
    "url" : "https://www.vicarius.io/vsociety/posts/cve202553640-detect-indico-vulnerability"
  }, {
    "type" : "WEB",
    "url" : "https://www.vicarius.io/vsociety/posts/cve202553640-mitigate-indico-vulnerability"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200", "CWE-639", "CWE-862" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-07-14T19:24:03Z",
    "nvd_published_at" : "2025-07-14T21:15:27Z"
  }
}