CVE-2025-49134: Weblate Weblate Exposes Personal IP Address Vulnerability

LOW
Advisory Identifier: GHSA-4qqf-9m5c-w2c5
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CVSS 5.3
CWE-359
Published
Advisory Summary

CVE-2025-49134 is a LOW (CVSS 5.3) weblate exposes personal ip address vulnerability (CWE-359: Exposure of Private Personal Information to an Unauthorized Actor) affecting Weblate libraries in the PyPI ecosystem. The issue involves weblate exposes personal ip address via e-mail. Remediation is available by upgrading affected packages to version 5.12.

CVE-2025-49134 at a Glance

CVE Identifier CVE-2025-49134
GHSA Identifier GHSA-4qqf-9m5c-w2c5
Severity LOW
CVSS v3.1 Base Score 5.3
CWE Classification CWE-359: Exposure of Private Personal Information to an Unauthorized Actor
Affected Product Weblate
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 5.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2025-49134

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

weblate fixed: 5.12 
pip install weblate>=5.12
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 weblate

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2025-49134, inspect your installed packages using pip:

pip show weblate

Analyze the terminal output to locate any version of Weblate in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 5.12), your application is affected.

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

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-359: Exposure of Private Personal Information to an Unauthorized Actor, where the product does not properly prevent a person's private, personal information from being accessed by actors who either (1) are not explicitly authorized to access the information or (2) do not have the implicit consent of the person about whom the information is collected. In Weblate, 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 The audit log notifications included the full IP address of the acting user. This could be obtained by third-party servers such as SMTP relays, or spam filters. ### Patches This issue has been addressed in Weblate 5.12 via https://github.com/WeblateOrg/weblate/pull/15102. ### References Thanks to [micael1](https://hackerone.com/micael1) for reporting this [issue at HackerOne](https://hackerone.com/reports/3179850).

CVE-2025-49134 Affected Weblate Versions

1 component(s)
Fixed Versions:
5.12
Product / Package Ecosystem Affected Versions Fixed Version
weblate
pypi/weblate
PyPI
< 5.12
5.12

References

GitHub Advisory / Wiki ADVISORY
https://github.com/WeblateOrg/weblate/security/advisories/GHSA-4qqf-9m5c-w2c5
NVD — CVE-2025-49134 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-49134
Weblate Source Repository REPOSITORY
https://github.com/WeblateOrg/weblate/pull/15102
Security Fix Commit FIX COMMIT
https://github.com/WeblateOrg/weblate/commit/020b2905e4d001cff2452574d10e6cf3621b5f62
Weblate Source Repository REPOSITORY
https://github.com/WeblateOrg/weblate
Weblate Release RELEASE
https://github.com/WeblateOrg/weblate/releases/tag/weblate-5.12.1

Frequently Asked Questions

What is CVE-2025-49134?
CVE-2025-49134 is a security vulnerability in Weblate involving Weblate exposes personal IP address via e-mail under CWE-359: Exposure of Private Personal Information to an Unauthorized Actor.
Which Weblate versions are affected?
Affected versions include releases prior to 5.12 across affected packages: weblate.
What version fixes CVE-2025-49134?
Upgrading to 5.12 (or the latest patched release for your respective branch) resolves the vulnerability.
Is weblate affected?
Yes, weblate is affected in releases prior to 5.12. Upgrade your dependency to 5.12 or later.
What is the CVSS score of CVE-2025-49134?
CVE-2025-49134 has a CVSS v3.1 base score of 5.3 (LOW) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2025-49134?
CVE-2025-49134 is classified under CWE-359: Exposure of Private Personal Information to an Unauthorized Actor (The product does not properly prevent a person's private, personal information from being accessed by actors who either (1) are not explicitly authorized to access the information or (2) do not have the implicit consent of the person about whom the information is collected.).
How can I check PyPI dependencies for CVE-2025-49134?
Run the dependency tree command: 'pip show weblate'. 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-4qqf-9m5c-w2c5",
  "modified" : "2025-07-16T21:03:18Z",
  "published" : "2025-06-16T14:52:56Z",
  "aliases" : [ "CVE-2025-49134" ],
  "summary" : "Weblate exposes personal IP address via e-mail",
  "details" : "### Impact\n\nThe audit log notifications included the full IP address of the acting user. This could be obtained by third-party servers such as SMTP relays, or spam filters.\n\n### Patches\n\nThis issue has been addressed in Weblate 5.12 via https://github.com/WeblateOrg/weblate/pull/15102.\n\n### References\n\nThanks to [micael1](https://hackerone.com/micael1) for reporting this [issue at HackerOne](https://hackerone.com/reports/3179850).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "weblate"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "5.12"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/WeblateOrg/weblate/security/advisories/GHSA-4qqf-9m5c-w2c5"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-49134"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/WeblateOrg/weblate/pull/15102"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/WeblateOrg/weblate/commit/020b2905e4d001cff2452574d10e6cf3621b5f62"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/WeblateOrg/weblate"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/WeblateOrg/weblate/releases/tag/weblate-5.12.1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-359" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-06-16T14:52:56Z",
    "nvd_published_at" : "2025-06-16T21:15:24Z"
  }
}