Home/CVE/Passing an absolute path to a file_exists check in phpBB before 3.2.4 allows Remote Code Execution through Object Inject
CVE

CVE-2018-19274

Passing an absolute path to a file_exists check in phpBB before 3.2.4 allows Remote Code Execution through Object Inject

Passing an absolute path to a file_exists check in phpBB before 3.2.4 allows Remote Code Execution through Object Injection by employing Phar deserialization when an attacker has access to the Admin Control Panel with founder permissions.

HIGH · CVSS 7.2 EPSS 0.13851
Act now
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 6% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
CWE-502Deserialization of Untrusted Data
▤

Affected Products & Versions

2
phpbb< 3.2.4
debian linuxall versions
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Packagist phpbb/phpbb HIGH fixed in 3.2.4
⚠

Public Exploits & PoCs

1
pocblog.ripstech.com · phpbb3-phar-deserialization-to-remote-code-executionblog.ripstech.com
▣

Scoring & Timeline

7.2
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD17 Nov 2018 · 01:29 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://lists.debian.org/debian-lts-announce/2018/11/msg00029.htmlMailing ListThird Party Advisory
https://www.phpbb.com/community/viewtopic.php?f=14&t=2492206PatchVendor Advisory
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