Project Pier <= 0.8.8 Arbitrary File Upload RCE
Project Pier 0.8.8 and earlier contains an unauthenticated arbitrary file upload vulnerability in tools/upload_file.php. The upload handler fails to validate the file type or enforce authentication, allowing remote attackers to upload malicious PHP files directly into a web-accessible directory. The uploaded file is stored with a predictable suffix and can be executed by requesting its URL, resulting in remote code execution.
- Published
- Aug 8, 2025
- Updated
- Jun 16, 2026
- EPSS
- 1.8% · 77th percentile
- CWE
- CWE-434
Sign in to follow · You’ll be notified if a followed record enters KEV, gets an exploit or is updated.
Report tools
Action score
38
Monitor
Low priority for now.
- CVSS
- 37 / 40 · 9.3 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 1.8%
CISA SSVC decision
- Exploitation
- proof of concept
- Automatable
- yes
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · VulnCheck
- 9.3
- NVD has not scored this yet; the score shown is the CNA’s.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
—
Versions reported by the vendor
Affected version ranges reported by the assigning authority (VulnCheck). Independent of NVD's CPE analysis and usually ahead of it.
ProjectPier ProjectPier
- up to and including 0.8.8affected · semver
Same product
projectpier: all recordsOther highest-scoring records for the same primary product.
- CVE-2018-10759PHP remote file inclusion vulnerability in public/patch/patch.php in Project Pier 0.8.8 and earlier allows remote attackers to execute arbit40Plan
- CVE-2018-10760Unrestricted file upload vulnerability in the Files plugin in ProjectPier 0.88 and earlier allows remote authenticated users to execute arbi35Monitor
- CVE-2008-5583Cross-site request forgery (CSRF) vulnerability in index.php in ProjectPier 0.8 and earlier allows remote attackers to perform actions as an27Monitor
- CVE-2015-2796Multiple cross-site scripting (XSS) vulnerabilities in Project-Pier ProjectPier-Core allow remote attackers to inject arbitrary web script o24Monitor
- CVE-2013-3637ProjectPier 0.8.8 does not use the Secure flag for cookies21Monitor
- CVE-2013-3636ProjectPier 0.8.8 has a Remote Information Disclosure Weakness because of the lack of the HttpOnly cookie flag21Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
Weaponized
A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.
Evidence
- Metasploit module ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Metasploit module | exploit/unix/webapp/projectpier_upload_execProject Pier Arbitrary File Upload Vulnerabilityexploit | 2012-10-08 |
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.
- Metasploit-4688 d
- Published
- TodaySep 30, 2026+418 d
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.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
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
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- Integrity
- Availability
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- X
Weakness class (CWE)
CWE-434 · Unrestricted Upload of File with Dangerous TypeCVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
nvd-secondary
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)
ATT&CK techniques
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- packetstorm.news/files/id/117070
- raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/webapp/projectpier_upload_exec.rb
- web.archive.org/web/20120111090432/http://www.projectpier.org/
- www.exploit-db.com/exploits/21929
- www.opensourcecms.com/projectpier/
- www.vulncheck.com/advisories/project-pier-arbitrary-file-upload-rce
Vendor advisories and official records. Exploit/PoC links are deliberately left out.