Security readout for executives and security teams
Plain-English summary
Weblate versions before 5.16.1 can expose addon configuration details through the REST API to users who should not see them. Any authenticated user may list or retrieve addon records across projects. If login is not required, anonymous access may also be possible. The issue is information disclosure, not direct code execution.
Executive priority
Treat as a near-term update for Weblate environments. It is not a critical takeover issue, but it can leak configuration information across projects and weaken tenant or project separation. Prioritize public or broadly accessible instances first.
Technical view
The AddonViewSet API used Addon.objects.all() without scoping results through get_queryset() based on user permissions. This affects GET access to addon collection and item records. CVSS is 4.3, with network access, low complexity, low privileges, no user interaction, and low confidentiality impact. Weblate 5.16.1 fixes the issue.
Likely exposure
Organizations running self-managed Weblate before 5.16.1 are exposed, especially where many users have accounts or REQUIRE_LOGIN is disabled. Exposure is limited to addon configuration data available through the affected API, based on the source description.
Exploitation context
The sources do not report active exploitation, and the CVE is not marked as KEV. The vulnerability requires API reachability and at least authentication unless the instance permits anonymous access. The business concern is unauthorized visibility into project and component addon configurations.
Researcher notes
Evidence is clear from the advisory and CVE description: the flaw is missing access control in AddonViewSet query scoping. Public sources identify version 5.16.1 as the fix. No public source in the bundle confirms exploitation in the wild.
Mitigation direction
- Upgrade Weblate to version 5.16.1 or later.
- Review Weblate vendor advisory and release notes for deployment-specific guidance.
- Ensure REQUIRE_LOGIN is enabled unless anonymous access is intentionally required.
- Limit API exposure to trusted networks where feasible.
- Review addon configurations for sensitive values or operational details.
Validation and detection
- Inventory Weblate instances and confirm running versions.
- Identify any instances running Weblate below 5.16.1.
- Check whether REQUIRE_LOGIN is disabled on affected deployments.
- Verify API addon results are scoped to authorized projects after upgrading.
- Review access logs for unusual addon API enumeration.
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-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. 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 lookupCWE-862: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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-2026-27457 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
- 4.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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:L/UI:N/S:U/C:L/I:N/A:N2.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/WeblateOrg/weblate/security/advisories/GHSA-wppc-7cq7-cgfvCVE reference · x_refsource_CONFIRM
- https://github.com/WeblateOrg/weblate/pull/18107CVE reference · x_refsource_MISC
- https://github.com/WeblateOrg/weblate/pull/18164CVE reference · x_refsource_MISC
- https://github.com/WeblateOrg/weblate/commit/3f58f9a4152bc0cbdd6eff5954f9c7bc4d9f0af9CVE reference · x_refsource_MISC
- https://github.com/WeblateOrg/weblate/commit/7802c9b121eb407c48d4adddd4f2458fb3efef0fCVE reference · x_refsource_MISC
- https://github.com/WeblateOrg/weblate/releases/tag/weblate-5.16.1CVE 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.
Exposure of Sensitive Information to an Unauthorized Actor
Exposure of Sensitive Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Missing Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.