Directory traversal vulnerability in session.rb in Hiki 0.8.0 through 0.8.6 allows remote attackers to delete arbitrary files via directory
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.
Noroxi analysis
No Noroxi analysis for this record yet
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We use this product, ask for help- Published
- Jul 2, 2007
- Updated
- Jun 16, 2026
- EPSS
- 2.4% · 83th percentile
- CWE
- CWE-22
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Report tools
Action score
26
Monitor
Low priority for now.
- CVSS
- 25 / 40 · 6.4 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 2.4%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| hiki | hiki | cpe:2.3:a:hiki:hiki |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- hiki hiki0.8.0
- hiki hiki0.8.1
- hiki hiki0.8.2
- hiki hiki0.8.3
- hiki hiki0.8.4
- hiki hiki0.8.5
- hiki hiki0.8.6
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | hiki | before 0.8.7-1 | 0.8.7-1 |
| Debian:4.0 | hiki | before 0.8.6-1etch1 | 0.8.6-1etch1 |
Same product
hiki: all recordsOther highest-scoring records for the same primary product.
- CVE-2005-2336Cross-site scripting (XSS) vulnerability in Hiki 0.8.0 to 0.8.2 allows remote attackers to inject arbitrary web script or HTML via "missing 17Monitor
- CVE-2005-2803Cross-site scripting (XSS) vulnerability in Hiki 0.8.1 to 0.8.2 allows remote attackers to inject arbitrary web script or HTML via a page na17Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:hiki | 0.8.7-1 · Debian:12 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- P · data or configuration can be modified
- Availability
- P · the service can be disrupted
- Attack complexity
- Low
- Confidentiality impact
- None
- Integrity impact
- P
- Availability impact
- P
Weakness class (CWE)
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')CVSS vector
AV:N/AC:L/Au:N/C:N/I:P/A:P
nvd-primary
Root cause
A user-supplied file name is joined with the allowed directory, but the result is never checked to confirm it is still inside that directory.
The bug in code
The whole CWE-22 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
const file = path.join(ROOT, req.query.name);res.sendFile(file);Fixed
const file = path.resolve(ROOT, req.query.name);if (!file.startsWith(ROOT + path.sep)) { return res.sendStatus(400);}res.sendFile(file);Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Path TraversalCAPEC-126likelihood: High · Very High
- Using Slashes and URL Encoding Combined to Bypass Validation LogicCAPEC-64likelihood: High · High
- Manipulating Web Input to File System CallsCAPEC-76likelihood: High · Very High
- Using Escaped Slashes in Alternate EncodingCAPEC-78likelihood: High · High
- Using Slashes in Alternate EncodingCAPEC-79likelihood: High · High
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- bugs.debian.org/cgi-bin/bugreport.cgi?bug=430691
- hikiwiki.org/en/advisory20070624.html
- hikiwiki.org/hiki-0_8_6.patch
- jvn.jp/jp/JVN%2305187780/index.html
- osvdb.org/37469
- secunia.com/advisories/25764
- secunia.com/advisories/25874
- www.debian.org/security/2007/dsa-1324
- www.securityfocus.com/bid/24603
- www.vupen.com/english/advisories/2007/2304
- exchange.xforce.ibmcloud.com/vulnerabilities/35029
Vendor advisories and official records. Exploit/PoC links are deliberately left out.