How severe is CVE-2015-3907?

CVE-2015-3907 has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2015-3907?

CVE-2015-3907 affects the following packages: chriskacerguis/codeigniter-restserver (Packagist). Ecosystems affected: Packagist.

How do I fix CVE-2015-3907?

Update chriskacerguis/codeigniter-restserver to 2.7.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2015-3907 is resolved across your whole dependency graph.

How do I detect CVE-2015-3907 in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for chriskacerguis/codeigniter-restserver, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2015-3907 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is CVE-2015-3907 actively exploited in the wild?

Yes. There are 1 known exploit references for CVE-2015-3907, including 1 in-the-wild exploitation observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2015-3907?

CVE-2015-3907 has an EPSS (Exploit Prediction Scoring System) score of 1.6%, placing it in the 76th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2015-3907?

CVE-2015-3907 is classified as XML External Entity (XXE) (CWE-611). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2015-3907 published, and has it been updated?

CVE-2015-3907 was published on May 24, 2022 and was last updated on December 7, 2023. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘

🐘 Packagist

Not in CISA KEV

CRITICAL severity

CVE-2015-3907 — codeigniter-restserver

CRITICALFix: chriskacerguis/codeigniter-restserver@852740e

CVE-2015-3907 is a critical-severity (CVSS 9.8) XML External Entity (XXE) vulnerability in chriskacerguis/codeigniter-restserver. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for chriskacerguis/codeigniter-restserver — see the affected versions and patch details below.

CodeIgniter Rest Server XXE Vulnerability

Published

May 24, 2022

Updated

Dec 7, 2023

Affected

1 pkg

Patched

1 / 1

Exploits

1 known

Exploitation data as of Nov 1, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

1.6%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs76th percentile — riskier than 76% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

🐘chriskacerguis/codeigniter-restserver

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

CodeIgniter Rest Server (aka codeigniter-restserver) 2.7.1 allows XXE attacks.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`chriskacerguis/codeigniter-restserver`	all versions	2.7.2`composer require chriskacerguis/codeigniter-restserver:^2.7.2`

Affected Products

1 product · 1 configurations

Application

codeigniter-restservercodeigniter-restserver_project

1 version

2.7.1

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

CodeIgniter Rest Server (aka codeigniter-restserver) 2.7.1 allows XXE at…

kb.hitcon.orgNVDJul 2019

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for chriskacerguis/codeigniter-restserver, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update chriskacerguis/codeigniter-restserver to 2.7.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2015-3907 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

CodeIgniter Rest Server (aka codeigniter-restserver) 2.7.1 allows XXE attacks.

O3 Security · Impact-Aware SCA

Is CVE-2015-3907 in your dependencies?

Find it across Packagist, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

9.8/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Raw vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE Classification

CWE-611XML External Entity (XXE)

Weaponization

No Nuclei template or Metasploit module yet. 1 public proof-of-concept reference is listed on this page.

OpenSSF Scorecard

Package health score

codeigniter-restserver

3.1/10

Code-Review4/10

Maintained0/10

Branch-ProtectionN/A

Assessed Oct 26, 2026

Timeline

First exploit

Jul 11, 2019

Disclosed

May 24, 2022

Last updated

Dec 7, 2023

Identifiers

CVE-2015-3907

References

Advisorynvd.nist.gov · CVE 2015 3907 Webgithub.com Webgithub.com · 852740e7c636e4f44b3a8e3afc15155795e22c9b Webkb.hitcon.org · codeigniter rest server module xxe cve 2015 3907 Packagegithub.com · codeigniter restserver

Related vulnerabilities

This CVE is critical severity; 1 of 8 other CVEs with CWE-611 is rated as high or higher (top: critical).

CVE-2026-108358CVE-2026-108357CVE-2026-61586CVE-2026-61741CVE-2026-61570CVE-2026-55848CVE-2026-54079CVE-2026-54078Browse all CWE-611

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedDec 7, 2023

CVE-2015-3907 — codeigniter-restserver

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Frequently Asked Questions

Is CVE-2015-3907 in your dependencies?