CVE-2023-50811: An issue discovered in SELESTA Visual Access Manager 4.38.6 allows attackers to modify the “computer” POST par

Routine

MEDIUM 6.5DOWNGRADE

CVE-2023-50811 is a medium-severity flaw (CVSS 6.5) affecting visual access manager. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue discovered in SELESTA Visual Access Manager 4.38.6 allows attackers to modify the “computer” POST parameter related to the ID of a specific reception by POST HTTP request interception. Iterating that parameter, it has been possible to access to the application and take control of many other receptions in addition the assigned one.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 61%)
CISA exploited list	No
Weakness	CWE-444, CWE-863
Published	2024-03-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: seling

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

Am I affected?

Timeline

2024-03-19 22:15 UTCPublished CVE record published
2026-06-17 06:40 UTCUpdated Record last modified

seling visual access manager DOWNGRADE

Affected: 4.38.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.38.6

1. Check installed version

apt-cache policy visual-access-manager || rpm -q visual-access-manager || visual-access-manager --version

2. No fixed release: DOWNGRADE to a release before 4.38.6 (Debian / Ubuntu)

apt-cache madison visual-access-manager sudo apt install visual-access-manager=<VERSION_BEFORE_4.38.6> sudo apt-mark hold visual-access-manager

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

dnf --showduplicates list visual-access-manager sudo dnf downgrade visual-access-manager-<VERSION_BEFORE_4.38.6> sudo dnf versionlock add visual-access-manager

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-2023-50811?

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

Is CVE-2023-50811 being exploited?

CVE-2023-50811 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-2023-50811 affect?

CVE-2023-50811 affects visual access manager. Severity is medium (CVSS 6.5). An issue discovered in SELESTA Visual Access Manager 4.38.6 allows attackers to modify the “computer” POST parameter related to the ID of a specific reception by POST HTTP request interception. Iterating that parameter, it has been possible

How urgent is CVE-2023-50811?

Priority 33/100. No elevated risk signals yet.

Related CVEs

CVE-2023-42250 MEDIUM 6.1 UPGRADE Selesta Visual Access Manager < 4.42.2 is vulnerable to Cross Site Scripting (XSS) via /common/autocomplete.ph
CVE-2023-42249 MEDIUM 6.1 UPGRADE Selesta Visual Access Manager < 4.42.2 is vulnerable to Cross Site Scripting (XSS) via vam/vam_visits.php.
CVE-2023-42248 MEDIUM 6.5 UPGRADE An issue was discovered in Selesta Visual Access Manager (VAM) prior to 4.42.2
CVE-2023-42247 MEDIUM 6.1 UPGRADE Selesta Visual Access Manager < 4.42.2 is vulnerable to Cross Site Scripting (XSS) via monitor/s_monitor_map.p
CVE-2023-42246 MEDIUM 6.1 UPGRADE Selesta Visual Access Manager < 4.42.2 is vulnerable to Cross Site Scripting (XSS) via /vam/vam_ep.php.

References

← Back to latest CVEs