CVE-2021-4254: A vulnerability has been found in ctrlo lenio and classified as problematic

Q: How do I fix CVE-2021-4254?

lenio: upgrade to 2021-02-08. Exact commands for each OS are on this page.

Q: Is CVE-2021-4254 being exploited?

CVE-2021-4254 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-2021-4254 affect?

CVE-2021-4254 affects lenio. Severity is low (CVSS 3.5). A vulnerability has been found in ctrlo lenio and classified as problematic. Affected by this vulnerability is an unknown functionality of the file views/layouts/main.tt of the component Notice Handler. The manipulation of the argument noti

Q: How urgent is CVE-2021-4254?

Priority 21/100. No elevated risk signals yet.

Routine

LOW 3.5UPGRADE

CVE-2021-4254 is a low-severity flaw (CVSS 3.5) affecting lenio. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability has been found in ctrlo lenio and classified as problematic. Affected by this vulnerability is an unknown functionality of the file views/layouts/main.tt of the component Notice Handler. The manipulation of the argument notice.notice.text leads to cross site scripting. The attack can be launched remotely. The name of the patch is aa300555343c1c081951fcb68bfb6852fbba7451. It is recommended to apply a patch to fix this issue. The as

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	3.5 (Low)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.4% (top 64%)
CISA exploited list	No
Weakness	CWE-707
Published	2022-12-18
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: ctrlo

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

Am I affected?

Timeline

2022-12-18 22:15 UTCPublished CVE record published
2026-06-17 04:19 UTCUpdated Record last modified

ctrlo lenio UPGRADE

Affected: < 2021-02-08

Fixed in: 2021-02-08

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 2021-02-08 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade lenio

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-2021-4254?

lenio: upgrade to 2021-02-08. Exact commands for each OS are on this page.

Is CVE-2021-4254 being exploited?

CVE-2021-4254 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-2021-4254 affect?

CVE-2021-4254 affects lenio. Severity is low (CVSS 3.5). A vulnerability has been found in ctrlo lenio and classified as problematic. Affected by this vulnerability is an unknown functionality of the file views/layouts/main.tt of the component Notice Handler. The manipulation of the argument noti

How urgent is CVE-2021-4254?

Priority 21/100. No elevated risk signals yet.

Related CVEs

CVE-2021-4257 LOW 3.5 UPGRADE A vulnerability was found in ctrlo lenio
CVE-2021-4256 LOW 3.5 UPGRADE A vulnerability was found in ctrlo lenio
CVE-2021-4255 LOW 3.5 UPGRADE A vulnerability was found in ctrlo lenio and classified as problematic
CVE-2021-4253 LOW 3.5 UPGRADE A vulnerability, which was classified as problematic, was found in ctrlo lenio

References

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