🛡️ CVE-2025-53640 — indico

🟡 CVSS 6.5 — Medium ⚠️ Exploit Public CWE-200 OSV
6.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Indico vulnerability allows attackers to bulk dump user details

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:

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. Rated impact: confidentiality low, integrity none, availability none.

Weakness class

CVE-2025-53640 is classified as CWE-200: Exposure of Sensitive Information. Information that should stay internal is disclosed to someone who is not authorised to see it.

Affected software

CVE-2025-53640 is recorded against 1 package.

  • indico (from 2.2 up to 3.3.7)

Timeline and source

Published on 14 July 2025 and last revised on 7 July 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from OSV.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Web)
docs.getindico.io (Web)
docs.getindico.io (Web)
github.com (Package)
github.com (Web)
www.vicarius.io (Web)
www.vicarius.io (Web)

Details

Severity MEDIUM
CVSS Score 6.5
CVSS Vector 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
CWE CWE-200
Public Exploit ⚠️ Yes
Source OSV
Published 2025-07-14
Updated 2026-08-12
Modified 2026-07-07
Fix URL N/A

Affected Packages

Software From version Fixed in
indico 2.2 3.3.7

Similar Threats

Exploit Protection

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