CVE-2021-3395: A cross-site scripting (XSS) vulnerability in Pryaniki 6.44.3 allows remote authenticated users to upload an a

Routine

MEDIUM 5.4DOWNGRADE

CVE-2021-3395 is a medium-severity flaw (CVSS 5.4) affecting pryaniki. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A cross-site scripting (XSS) vulnerability in Pryaniki 6.44.3 allows remote authenticated users to upload an arbitrary file. The JavaScript code will execute when someone visits the attachment.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.8% (top 45%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-02-02
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: pryaniki

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

Am I affected?

Timeline

2021-02-02 21:15 UTCPublished CVE record published
2026-06-17 04:05 UTCUpdated Record last modified

pryaniki pryaniki DOWNGRADE

Affected: 6.44.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.44.3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 6.44.3 (Debian / Ubuntu)

apt-cache madison pryaniki sudo apt install pryaniki=<VERSION_BEFORE_6.44.3> sudo apt-mark hold pryaniki

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

dnf --showduplicates list pryaniki sudo dnf downgrade pryaniki-<VERSION_BEFORE_6.44.3> sudo dnf versionlock add pryaniki

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-2021-3395?

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

Is CVE-2021-3395 being exploited?

CVE-2021-3395 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-2021-3395 affect?

CVE-2021-3395 affects pryaniki. Severity is medium (CVSS 5.4). A cross-site scripting (XSS) vulnerability in Pryaniki 6.44.3 allows remote authenticated users to upload an arbitrary file. The JavaScript code will execute when someone visits the attachment.

How urgent is CVE-2021-3395?

Priority 33/100. No elevated risk signals yet.

References

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