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MEDIUM severity

phpBB Server-Side Request Forgery VulnerabilityGHSA-jhm9-h84h-rw83

MEDIUMFix: phpbb/phpbb-app@0cfaaaf

GHSA-jhm9-h84h-rw83 is a medium-severity (CVSS 5.8) CWE-610 vulnerability in phpbb/phpbb. A fix is available for phpbb/phpbb — see the affected versions and patch details below.

Also known asBIT-phpbb-2020-8226CVE-2020-8226
Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Nov 11, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.0%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs62th percentile — riskier than 62% of all scored CVEsHighest risk
0.00%0.49%0.98%1.47%0.2%1.0%May 26Sep 26Nov 26

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

2 pkgs affected
🐘phpbb/phpbb🐘phpbb/phpbb

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

A vulnerability exists in phpBB <v3.2.10 and <v3.3.1 which allowed remote image dimensions check to be used to SSRF.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistphpbb/phpbb≥ 3.2.0&&< 3.2.103.2.10composer require phpbb/phpbb:^3.2.10
🐘Packagistphpbb/phpbb≥ 3.3.0&&< 3.3.13.3.1composer require phpbb/phpbb:^3.3.1

Affected Products

1 product · 2 configurations
Application
phpbbphpbb
≥ 3.3.0 && < 3.3.1
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update phpbb/phpbb to 3.2.10 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-jhm9-h84h-rw83 is resolved across your whole dependency graph.

  3. Workarounds

    Restrict outbound requests from the affected component to an allowlist of hosts, block access to link-local and internal address ranges at the network layer, and require authentication on internal services so a forged request cannot reach them unauthenticated.

Frequently Asked Questions

A vulnerability exists in phpBB <v3.2.10 and <v3.3.1 which allowed remote image dimensions check to be used to SSRF.
O3 Security · Impact-Aware SCA

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phpBB Server-Side Request Forgery Vulnerability