Security readout for executives and security teams
Plain-English summary
Indico versions before 3.3.11 expose an event series management API without proper access checks. An unauthenticated or unauthorized person could view limited series metadata, modify a series, or delete a series. Sources state this does not expose full event content or allow tampering with user-visible event data.
Executive priority
Treat as a medium-priority fix for Indico environments, especially public-facing conference or event portals. The issue can disrupt event series administration and expose limited scheduling metadata, but sources state it does not expose full event data.
Technical view
CVE-2026-28352 is a CWE-306 missing authentication/access-control issue in Indico’s event series management API. It affects Indico versions earlier than 3.3.11. CVSS 3.1 is 6.5: network-accessible, low complexity, no privileges or user interaction, with low confidentiality and integrity impact and no availability impact.
Likely exposure
Organizations running Indico before 3.3.11 may be exposed if the series management API endpoint is reachable by untrusted users or the public internet. Exposure is lower where webserver rules already restrict access to that endpoint.
Exploitation context
The source bundle does not indicate active exploitation, and the CVE is not listed as KEV. The advisory describes unauthorized access to a management endpoint with limited impact: metadata disclosure plus series modification or deletion, not full event access.
Researcher notes
Evidence is limited to the CVE record, GitHub advisory, and v3.3.11 release reference. No public exploitation evidence is provided. Validate endpoint exposure carefully, but avoid assuming broader event data compromise beyond the metadata and series operations stated in the advisory.
Mitigation direction
- Upgrade Indico to version 3.3.11 or later.
- If immediate upgrade is not possible, restrict the series management API endpoint at the webserver.
- Review vendor advisory and release notes for deployment-specific guidance.
Validation and detection
- Inventory Indico deployments and identify versions below 3.3.11.
- Confirm whether the series management API endpoint is reachable by unauthenticated users.
- Verify webserver restrictions are applied if upgrade is delayed.
- After upgrading, confirm Indico reports version 3.3.11 or later.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-306: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-28352 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N3.92.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/indico/indico/security/advisories/GHSA-rfpp-2hgm-gp5vCVE reference · x_refsource_CONFIRM
- https://github.com/indico/indico/releases/tag/v3.3.11CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Missing Authentication for Critical Function
Missing Authentication for Critical Function represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.