CVE-2007-2836: Directory traversal vulnerability in session.rb in Hiki 0.8.0 through 0.8.6 allows remote attackers to delete

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MEDIUM 6.4DOWNGRADE

CVE-2007-2836 is a medium-severity flaw (CVSS 6.4) affecting hiki. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Directory traversal vulnerability in session.rb in Hiki 0.8.0 through 0.8.6 allows remote attackers to delete arbitrary files via directory traversal sequences in the session ID, which is matched against an insufficiently restrictive regular expression before it is used to construct a filename that is marked for deletion at logout.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	6.4 (Medium)
EPSS exploit chance	2.4% (top 16%)
CISA exploited list	No
Weakness	CWE-22
Published	2007-07-02
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: hiki

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2007-07-02 19:30 UTCPublished CVE record published
2026-06-16 22:40 UTCUpdated Record last modified

hiki hiki DOWNGRADE

Affected: 0.8.0 · 0.8.1 · 0.8.2 · 0.8.3 · 0.8.4 · 0.8.5 · 0.8.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.8.0

1. Check installed version

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

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

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

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

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

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-2007-2836?

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

Is CVE-2007-2836 being exploited?

CVE-2007-2836 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-2007-2836 affect?

CVE-2007-2836 affects hiki. Severity is medium (CVSS 6.4). Directory traversal vulnerability in session.rb in Hiki 0.8.0 through 0.8.6 allows remote attackers to delete arbitrary files via directory traversal sequences in the session ID, which is matched against an insufficiently restrictive regula

How urgent is CVE-2007-2836?

Priority 43/100. No elevated risk signals yet.

Related CVEs

CVE-2005-2803 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in Hiki 0.8.1 to 0.8.2 allows remote attackers to inject arbitrary we
CVE-2005-2336 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in Hiki 0.8.0 to 0.8.2 allows remote attackers to inject arbitrary we

References

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