CVE-2023-23015: Cross Site Scripting (XSS) vulnerability in Kalkun 0.8.0 via username input in file User_model.php.

Routine

MEDIUM 6.1DOWNGRADE

CVE-2023-23015 is a medium-severity flaw (CVSS 6.1) affecting kalkun. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross Site Scripting (XSS) vulnerability in Kalkun 0.8.0 via username input in file User_model.php.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 62%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-01-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: kalkun project

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

Am I affected?

Timeline

2023-01-20 19:15 UTCPublished CVE record published
2026-06-17 05:36 UTCUpdated Record last modified

kalkun project kalkun DOWNGRADE

Affected: 0.8.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.8.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.8.0 (Debian / Ubuntu)

apt-cache madison kalkun sudo apt install kalkun=<VERSION_BEFORE_0.8.0> sudo apt-mark hold kalkun

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

dnf --showduplicates list kalkun sudo dnf downgrade kalkun-<VERSION_BEFORE_0.8.0> sudo dnf versionlock add kalkun

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-2023-23015?

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

Is CVE-2023-23015 being exploited?

CVE-2023-23015 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-2023-23015 affect?

CVE-2023-23015 affects kalkun. Severity is medium (CVSS 6.1). Cross Site Scripting (XSS) vulnerability in Kalkun 0.8.0 via username input in file User_model.php.

How urgent is CVE-2023-23015?

Priority 36/100. Public exploit reference

Software pages

PHP vulnerabilities

References

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