Vulnerabilities in pkg:pypi/papermerge

PACKAGE
Advisory Identifier: GHSA-9w49-m7xh-5r39
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Advisory Summary

CVE-2020-29456 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Papermerge libraries in the PyPI ecosystem. The issue involves cross-site scripting in papermerge. Remediation is available by upgrading affected packages to version 1.5.2.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:pypi/papermerge

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:pypi/papermerge. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-9w49-m7xh-5r39 CVE-2020-29456 MODERATE Cross-site scripting in papermerge

CVE-2020-29456 at a Glance

CVE Identifier CVE-2020-29456
GHSA Identifier GHSA-9w49-m7xh-5r39
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Papermerge
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 6.1

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:R/S:C/C:L/I:L/A:N).

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

How to Fix CVE-2020-29456

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

papermerge fixed: 1.5.2 
pip install papermerge>=1.5.2
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 papermerge

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2020-29456, inspect your installed packages using pip:

pip show papermerge

Analyze the terminal output to locate any version of Papermerge in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.5.2), your application is affected.

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

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Papermerge, 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

Multiple cross-site scripting (XSS) vulnerabilities in Papermerge before 1.5.2 allow remote attackers to inject arbitrary web script or HTML via the rename, tag, upload, or create folder function. The payload can be in a folder, a tag, or a document's filename. If email consumption is configured in Papermerge, a malicious document can be sent by email and is automatically uploaded into the Papermerge web application. Therefore, no authentication is required to exploit XSS if email consumption is configured. Otherwise authentication is required.

CVE-2020-29456 Affected Papermerge Versions

1 component(s)
Fixed Versions:
1.5.2
Product / Package Ecosystem Affected Versions Fixed Version
papermerge
pypi/papermerge
PyPI
≥ 1.2.0
< 1.5.2
1.5.2

References

NVD — CVE-2020-29456 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-29456
Papermerge Source Repository REPOSITORY
https://github.com/ciur/papermerge/issues/228
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-9w49-m7xh-5r39
Papermerge Source Repository REPOSITORY
https://github.com/ciur/papermerge
Papermerge Release RELEASE
https://github.com/ciur/papermerge/releases/tag/v1.5.2
Papermerge Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/papermerge/PYSEC-2020-74.yaml
Papermerge Security Information SECURITY
https://www.papermerge.com

Frequently Asked Questions

What is CVE-2020-29456?
CVE-2020-29456 is a security vulnerability in Papermerge involving Cross-site scripting in papermerge under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Papermerge versions are affected?
Affected versions include releases prior to 1.5.2 across affected packages: papermerge.
What version fixes CVE-2020-29456?
Upgrading to 1.5.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is papermerge affected?
Yes, papermerge is affected in releases prior to 1.5.2. Upgrade your dependency to 1.5.2 or later.
What is the CVSS score of CVE-2020-29456?
CVE-2020-29456 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2020-29456?
CVE-2020-29456 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check PyPI dependencies for CVE-2020-29456?
Run the dependency tree command: 'pip show papermerge'. 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-9w49-m7xh-5r39",
  "modified" : "2024-10-09T20:17:44Z",
  "published" : "2021-04-20T16:37:56Z",
  "aliases" : [ "CVE-2020-29456" ],
  "summary" : "Cross-site scripting in papermerge",
  "details" : "Multiple cross-site scripting (XSS) vulnerabilities in Papermerge before 1.5.2 allow remote attackers to inject arbitrary web script or HTML via the rename, tag, upload, or create folder function. The payload can be in a folder, a tag, or a document's filename. If email consumption is configured in Papermerge, a malicious document can be sent by email and is automatically uploaded into the Papermerge web application. Therefore, no authentication is required to exploit XSS if email consumption is configured. Otherwise authentication is required.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "papermerge"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.2.0"
      }, {
        "fixed" : "1.5.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-29456"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ciur/papermerge/issues/228"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-9w49-m7xh-5r39"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ciur/papermerge"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ciur/papermerge/releases/tag/v1.5.2"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/papermerge/PYSEC-2020-74.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://www.papermerge.com"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-04-09T21:59:25Z",
    "nvd_published_at" : "2020-12-02T08:15:00Z"
  }
}