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Not in CISA KEV
HIGH severity

CVE-2016-4879 — basercms

HIGH

CVE-2016-4879 is a high-severity (CVSS 8.8) Cross-Site Request Forgery (CSRF) vulnerability in baserproject/basercms. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

CSRF in baserCMS 3.0.10 and earlier

Also known asGHSA-397g-4jpj-44xg
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
None indexed
Exploitation data as of Nov 7, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.9%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs59th percentile — riskier than 59% of all scored CVEsHighest risk
0.00%0.46%0.92%1.38%0.1%0.9%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

1 pkg affected
🐘baserproject/basercms

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

Cross-site request forgery (CSRF) vulnerability in baserCMS plugin Mail version 3.0.10 and earlier allows remote attackers to hijack the authentication of administrators via unspecified vectors.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🐘Packagistbaserproject/basercmsall versionsNo fix

Affected Products

2 products · 2 configurations
Application
basercmsbasercms
≤ 3.0.10
range
Application
mailbasercms
≤ 3.0.10
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 baserproject/basercms, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    The records we use list no patched version of baserproject/basercms for CVE-2016-4879. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    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

Cross-site request forgery (CSRF) vulnerability in baserCMS plugin Mail version 3.0.10 and earlier allows remote attackers to hijack the authentication of administrators via unspecified vectors.
O3 Security · Impact-Aware SCA

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CVE-2016-4879: basercms CSRF (High 8.8)