CVE-2018-19274
phpBB Remote Code Execution
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2018-19274- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.5 Medium
AV:N/AC:L/Au:S/C:P/I:P/A:P - Weakness
- CWE-502, CWE-1321
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2018-19274- Updated
- 2026-11-02
EUVDEUVD-2022-4053 No score
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.
- Record
EUVD-2022-4053- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-h3mr-q96r-37v4
phpBB Remote Code Execution
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.
- Record
GHSA-h3mr-q96r-37v4- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-502
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2018-19274- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-h3mr-q96r-37v4
phpBB Remote Code Execution
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.
- Record
GHSA-h3mr-q96r-37v4- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-502
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2018-19274
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.
- Record
UBUNTU-CVE-2018-19274- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
phpbb/phpbbPackagist |
before 3.2.4 | 3.2.4 |
phpbb3Debian:8 |
before 3.0.12-5+deb8u2, plus listed versions 3.0.12-53.0.12-5+deb8u1 |
3.0.12-5+deb8u2 |
phpbb/phpbbPackagist |
before 3.2.4, plus listed versions 3.0.123.0.12-RC13.0.12-RC23.0.12-RC33.0.13 Show 45 moreShow less3.0.13-PL13.0.13-RC13.0.143.0.14-RC13.1.03.1.0-RC13.1.0-RC23.1.0-RC33.1.0-RC43.1.0-RC53.1.0-RC63.1.0-a13.1.0-a23.1.0-a33.1.0-b13.1.0-b23.1.0-b33.1.0-b43.1.13.1.103.1.10-RC13.1.113.1.11-RC13.1.123.1.23.1.2-RC13.1.33.1.3-RC13.1.3-RC23.1.43.1.4-RC13.1.4-RC23.1.53.1.5-RC13.1.63.1.6-RC13.1.73.1.7-RC13.1.7-pl13.1.83.1.8-RC13.1.93.1.9-RC13.2.03.2.0-RC1 |
3.2.4 |
phpbb3Ubuntu:Pro:14.04:LTS |
before 3.0.12-1ubuntu0.1~esm1, plus listed versions 3.0.11-53.0.12-1 |
3.0.12-1ubuntu0.1~esm1 |
phpbb3Ubuntu:16.04:LTS |
All versions, plus listed versions 3.0.14-13.0.14-1ubuntu1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-19274 is a high vulnerability (CVSS 7.2) in Phpbb, published November 17, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 5.20%, the 92nd percentile. Fixed in phpbb/phpbb 3.2.4.
References
blog.ripstech.com/2018/phpbb3-phar-deserialization-to-remote-code-execution
phpbb.com/community/viewtopic.php?f=14&t=2492206
lists.debian.org/debian-lts-announce/2018/11/msg00029.html
nvd.nist.gov/vuln/detail/CVE-2018-19274
github.com/advisories/GHSA-h3mr-q96r-37v4
ubuntu.com/security/CVE-2018-19274
cve.org/CVERecord?id=CVE-2018-19274
Left out here: 11 versions. The JSON record has them.