CVE-2020-8434: Jenzabar JICS (aka Internet Campus Solution) before 9.0.1 Patch 3, 9.1 before 9.1.2 Patch 2, and 9.2 before 9.

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2020-8434 is a critical-severity flaw (CVSS 9.8) affecting internet campus solution. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Jenzabar JICS (aka Internet Campus Solution) before 9.0.1 Patch 3, 9.1 before 9.1.2 Patch 2, and 9.2 before 9.2.2 Patch 8 has session cookies that are a deterministic function of the username. There is a hard-coded password to supply a PBKDF feeding into AES to encrypt a username and base64 encode it to a client-side cookie for persistent session authentication. By knowing the key and algorithm, an attacker can select any username, encrypt it, ba

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.3% (top 29%)
CISA exploited list	No
Weakness	CWE-384
Published	2020-05-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: jenzabar

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

Am I affected?

Timeline

2020-05-19 13:15 UTCPublished CVE record published
2026-06-17 03:26 UTCUpdated Record last modified

jenzabar internet campus solution UPGRADE

Affected: <= 9.0.1 · >= 9.1.0 and <= 9.1.2 · >= 9.2.0 and <= 9.2.2

Fixed in: newer than 9.2.2

Safe to downgrade to: a release before 9.1.0

1. Check installed version

apt-cache policy internet-campus-solution || rpm -q internet-campus-solution || internet-campus-solution --version

2. UPGRADE to newer than 9.2.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade internet-campus-solution

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade internet-campus-solution

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 9.1.0 (Debian / Ubuntu)

apt-cache madison internet-campus-solution sudo apt install internet-campus-solution=<VERSION_BEFORE_9.1.0> sudo apt-mark hold internet-campus-solution

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list internet-campus-solution sudo dnf downgrade internet-campus-solution-<VERSION_BEFORE_9.1.0> sudo dnf versionlock add internet-campus-solution

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-2020-8434?

internet campus solution: upgrade to newer than 9.2.2. Exact commands for each OS are on this page.

Is CVE-2020-8434 being exploited?

CVE-2020-8434 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-2020-8434 affect?

CVE-2020-8434 affects internet campus solution. Severity is critical (CVSS 9.8). Jenzabar JICS (aka Internet Campus Solution) before 9.0.1 Patch 3, 9.1 before 9.1.2 Patch 2, and 9.2 before 9.2.2 Patch 8 has session cookies that are a deterministic function of the username. There is a hard-coded password to supply a PBKD

How urgent is CVE-2020-8434?

Priority 57/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2019-10012 HIGH 7.5 DOWNGRADE UPGRADE Jenzabar JICS (aka Internet Campus Solution) before 9 allows remote attackers to upload and execute arbitrary
CVE-2019-10011 CRITICAL 9.8 UPGRADE ICS/StaticPages/AddTestUsers.aspx in Jenzabar JICS (aka Internet Campus Solution) before 2019-02-06 allows rem

References

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