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CVE-2025-28254: Cross Site Scripting vulnerability in Leantime v3.2.1 and before allows an authenticated attacker to execute a

26
Routine
MEDIUM 5.4UPGRADE

CVE-2025-28254 is a medium-severity flaw (CVSS 5.4) affecting leantime. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross Site Scripting vulnerability in Leantime v3.2.1 and before allows an authenticated attacker to execute arbitrary code and obtain sensitive information via the first name field in processMentions().

Why this priority

  • No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score5.4 (Medium)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededLow
User interactionRequired
EPSS exploit chance0.3% (top 73%)
CISA exploited listNo
WeaknessCWE-79
Published2025-03-28
Last modified2026-06-17
Publisher (CNA): MITRE · Vendor: leantime

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

Am I affected?

Timeline

leantime leantime UPGRADE
Affected: < 3.3.0
Fixed in: 3.3.0
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy leantime || rpm -q leantime || leantime --version
2. UPGRADE to 3.3.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade leantime
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade leantime
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-2025-28254?

leantime: upgrade to 3.3.0. Exact commands for each OS are on this page.

Is CVE-2025-28254 being exploited?

CVE-2025-28254 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-2025-28254 affect?

CVE-2025-28254 affects leantime. Severity is medium (CVSS 5.4). Cross Site Scripting vulnerability in Leantime v3.2.1 and before allows an authenticated attacker to execute arbitrary code and obtain sensitive information via the first name field in processMentions().

How urgent is CVE-2025-28254?

Priority 26/100. No elevated risk signals yet.

References

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