CVE-2021-27352: An open redirect vulnerability in Ilch CMS version 2.1.42 allows attackers to redirect users to an attacker's

Routine

MEDIUM 5.4DOWNGRADE

CVE-2021-27352 is a medium-severity flaw (CVSS 5.4) affecting ilch cms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An open redirect vulnerability in Ilch CMS version 2.1.42 allows attackers to redirect users to an attacker's site after a successful login.

Why this priority

Public exploit reference

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 42%)
CISA exploited list	No
Weakness	CWE-601
Published	2021-03-29
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ilch

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

Am I affected?

Timeline

2021-03-29 16:15 UTCPublished CVE record published
2026-06-17 03:44 UTCUpdated Record last modified

ilch ilch cms DOWNGRADE

Affected: 2.1.42

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.1.42

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.1.42 (Debian / Ubuntu)

apt-cache madison ilch-cms sudo apt install ilch-cms=<VERSION_BEFORE_2.1.42> sudo apt-mark hold ilch-cms

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

dnf --showduplicates list ilch-cms sudo dnf downgrade ilch-cms-<VERSION_BEFORE_2.1.42> sudo dnf versionlock add ilch-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-2021-27352?

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

Is CVE-2021-27352 being exploited?

CVE-2021-27352 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-2021-27352 affect?

CVE-2021-27352 affects ilch cms. Severity is medium (CVSS 5.4). An open redirect vulnerability in Ilch CMS version 2.1.42 allows attackers to redirect users to an attacker's site after a successful login.

How urgent is CVE-2021-27352?

Priority 38/100. Public exploit reference

Related CVEs

CVE-2019-20524 MEDIUM 6.1 DOWNGRADE ilchCMS 2.1.23 allows XSS via the index.php/partner/index Banner parameter.
CVE-2019-20523 MEDIUM 6.1 DOWNGRADE ilchCMS 2.1.23 allows XSS via the index.php/partner/index Name parameter.
CVE-2019-20522 MEDIUM 6.1 DOWNGRADE ilchCMS 2.1.23 allows XSS via the index.php/partner/index Link parameter.
CVE-2019-17046 HIGH 7.2 DOWNGRADE Ilch 2.1.22 allows remote code execution because php is listed under "Allowed files" on the index.php/admin/me
CVE-2019-17045 MEDIUM 4.8 DOWNGRADE Ilch 2.1.22 allows stored XSS via the title, text, or email id to the Jobs Tab.

References

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