CVE-2013-6793: Multiple cross-site scripting (XSS) vulnerabilities in the Calendar module in Olat 7.8.0.1 (b20130821 N1) allo

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MEDIUM 4.3DOWNGRADE

CVE-2013-6793 is a medium-severity flaw (CVSS 4.3) affecting olat. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple cross-site scripting (XSS) vulnerabilities in the Calendar module in Olat 7.8.0.1 (b20130821 N1) allow remote attackers to inject arbitrary web script or HTML via the (1) event name or (2) date field.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	3.2% (top 12%)
CISA exploited list	No
Weakness	CWE-79
Published	2013-11-14
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: olat

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

Am I affected?

Timeline

2013-11-14 20:55 UTCPublished CVE record published
2026-06-17 00:00 UTCUpdated Record last modified

olat olat DOWNGRADE

Affected: 7.8.0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.8.0.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 7.8.0.1 (Debian / Ubuntu)

apt-cache madison olat sudo apt install olat=<VERSION_BEFORE_7.8.0.1> sudo apt-mark hold olat

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

dnf --showduplicates list olat sudo dnf downgrade olat-<VERSION_BEFORE_7.8.0.1> sudo dnf versionlock add olat

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Olat CMS 7.8.0.1 - Persistent Cross-Site Scripting

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-2013-6793?

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

Is CVE-2013-6793 being exploited?

CVE-2013-6793 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-2013-6793 affect?

CVE-2013-6793 affects olat. Severity is medium (CVSS 4.3). Multiple cross-site scripting (XSS) vulnerabilities in the Calendar module in Olat 7.8.0.1 (b20130821 N1) allow remote attackers to inject arbitrary web script or HTML via the (1) event name or (2) date field.

How urgent is CVE-2013-6793?

Priority 42/100. Public exploit reference

Related CVEs

CVE-2013-6794 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in the Calendar module in Olat 7.8.0.1 (b20130821 N1) allows remote a

References

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