CVE-2020-29456: Multiple cross-site scripting (XSS) vulnerabilities in Papermerge before 1.5.2 allow remote attackers to injec

Q: How do I fix CVE-2020-29456?

papermerge: upgrade to 1.5.2. Exact commands for each OS are on this page.

Q: Is CVE-2020-29456 being exploited?

CVE-2020-29456 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-29456 affect?

CVE-2020-29456 affects papermerge. Severity is medium (CVSS 6.1). 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

Q: How urgent is CVE-2020-29456?

Priority 40/100. No elevated risk signals yet.

This month

MEDIUM 6.1UPGRADE

CVE-2020-29456 is a medium-severity flaw (CVSS 6.1) affecting papermerge. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.6% (top 25%)
CISA exploited list	No
Weakness	CWE-79
Published	2020-12-02
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: papermerge

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-12-02 08:15 UTCPublished CVE record published
2026-06-17 03:11 UTCUpdated Record last modified

papermerge papermerge UPGRADE

Affected: < 1.5.2

Fixed in: 1.5.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy papermerge || rpm -q papermerge || papermerge --version

2. UPGRADE to 1.5.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade papermerge

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade papermerge

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-29456?

papermerge: upgrade to 1.5.2. Exact commands for each OS are on this page.

Is CVE-2020-29456 being exploited?

CVE-2020-29456 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-29456 affect?

CVE-2020-29456 affects papermerge. Severity is medium (CVSS 6.1). 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

How urgent is CVE-2020-29456?

Priority 40/100. No elevated risk signals yet.

References

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