CVE-2023-31434: The parameters nutzer_titel, nutzer_vn, and nutzer_nn in the user profile, and langID and ONLINEID in direct l

Routine

MEDIUM 5.4DOWNGRADE

CVE-2023-31434 is a medium-severity flaw (CVSS 5.4) affecting evasys. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The parameters nutzer_titel, nutzer_vn, and nutzer_nn in the user profile, and langID and ONLINEID in direct links, in evasys before 8.2 Build 2286 and 9.x before 9.0 Build 2401 do not validate input, which allows authenticated attackers to inject HTML Code and XSS payloads in multiple locations.

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	0.5% (top 60%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-05-02
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: evasys

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

Am I affected?

Timeline

2023-05-02 20:15 UTCPublished CVE record published
2026-06-17 05:56 UTCUpdated Record last modified

evasys evasys DOWNGRADE

Affected: 8.2 · 9.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 8.2 (Debian / Ubuntu)

apt-cache madison evasys sudo apt install evasys=<VERSION_BEFORE_8.2> sudo apt-mark hold evasys

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

dnf --showduplicates list evasys sudo dnf downgrade evasys-<VERSION_BEFORE_8.2> sudo dnf versionlock add evasys

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-2023-31434?

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

Is CVE-2023-31434 being exploited?

CVE-2023-31434 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-2023-31434 affect?

CVE-2023-31434 affects evasys. Severity is medium (CVSS 5.4). The parameters nutzer_titel, nutzer_vn, and nutzer_nn in the user profile, and langID and ONLINEID in direct links, in evasys before 8.2 Build 2286 and 9.x before 9.0 Build 2401 do not validate input, which allows authenticated attackers to

How urgent is CVE-2023-31434?

Priority 34/100. Public exploit reference

Related CVEs

CVE-2023-31435 HIGH 8.1 DOWNGRADE Multiple components (such as Onlinetemplate-Verwaltung, Liste aller Teilbereiche, Umfragen anzeigen, and quest
CVE-2023-31433 HIGH 8.8 DOWNGRADE A SQL injection issue in Logbuch in evasys before 8.2 Build 2286 and 9.x before 9.0 Build 2401 allows authenti

References

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