CVE-2024-55342: A file upload functionality in Piranha CMS 11.1 allows authenticated remote attackers to upload a crafted PDF

Routine

MEDIUM 4.7DOWNGRADE

CVE-2024-55342 is a medium-severity flaw (CVSS 4.7) affecting piranha cms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A file upload functionality in Piranha CMS 11.1 allows authenticated remote attackers to upload a crafted PDF file to /manager/media. This PDF can contain malicious JavaScript code, which is executed when a victim user opens or interacts with the PDF in their web browser, leading to a XSS vulnerability.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.7 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.5% (top 57%)
CISA exploited list	No
Weakness	CWE-79
Published	2024-12-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: dotnetfoundation

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

Am I affected?

Timeline

2024-12-20 19:15 UTCPublished CVE record published
2026-06-17 08:11 UTCUpdated Record last modified

dotnetfoundation piranha cms DOWNGRADE

Affected: 11.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.1

1. Check installed version

apt-cache policy piranha-cms || rpm -q piranha-cms || piranha-cms --version

2. No fixed release: DOWNGRADE to a release before 11.1 (Debian / Ubuntu)

apt-cache madison piranha-cms sudo apt install piranha-cms=<VERSION_BEFORE_11.1> sudo apt-mark hold piranha-cms

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list piranha-cms sudo dnf downgrade piranha-cms-<VERSION_BEFORE_11.1> sudo dnf versionlock add piranha-cms

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2024-55342?

piranha cms: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-55342 being exploited?

CVE-2024-55342 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-2024-55342 affect?

CVE-2024-55342 affects piranha cms. Severity is medium (CVSS 4.7). A file upload functionality in Piranha CMS 11.1 allows authenticated remote attackers to upload a crafted PDF file to /manager/media. This PDF can contain malicious JavaScript code, which is executed when a victim user opens or interacts wi

How urgent is CVE-2024-55342?

Priority 32/100. Public exploit reference

Related CVEs

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CVE-2025-61413 MEDIUM 6.1 DOWNGRADE A stored cross-site scripting (XSS) vulnerability in the /manager/pages component of Piranha CMS v12.0 allows
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CVE-2024-55341 MEDIUM 4.7 DOWNGRADE A stored cross-site scripting (XSS) vulnerability in Piranha CMS 11.1 allows remote attackers to execute arbit

References

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