CVE-2020-29456 json
Cross-site scripting in papermerge
published 2020-12-02 5 y ago modified 2026-06-17 4 mo ago also GHSA-9w49-m7xh-5r39 , PYSEC-2020-74 , EUVD-2020-0126
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.6%
- EPSS 1.6% chance of exploitation in 30 days, percentile 75%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- pypi papermerge 1.5.2
- papermerge papermerge 1.5.2
Exploit prediction
1.56% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
| GitHub | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | papermerge | >=1.2.0, <1.5.2 |
1.5.2 |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
papermerge.com
/
product, web
-
github.com
/ciur/papermerge/issues/228
web, third-party-advisory, report
-
github.com
/ciur/papermerge/releases/tag/v1.5.2
web, release-notes, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-29456
advisory
-
github.com
/advisories/GHSA-9w49-m7xh-5r39
advisory
-
github.com
/ciur/papermerge
package
-
github.com
/pypa/advisory-database/tree/main/vulns/papermerge/PYSEC-2020-74.yaml
web
-
papermerge.com
web
Sources
- CVE List CVE-2020-29456
- GitHub Advisory GHSA-9w49-m7xh-5r39
- NVD CVE-2020-29456
- OSV PYSEC-2020-74
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.