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MEDIUM severity

CVE-2026-48923 — jenkinsci-appspider-plugin

MEDIUM

CVE-2026-48923 is a medium-severity (CVSS 4.3) Improper Privilege Management vulnerability in com.rapid7:jenkinsci-appspider-plugin. A fix is available for com.rapid7:jenkinsci-appspider-plugin — see the affected versions and patch details below.

Jenkins AppSpider Plugin does not perform a permission check in a method implementing form validation

Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 7, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-48923.

EPSS Exploitation Probability

via FIRST.org ↗
0.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs19th percentile — riskier than 19% of all scored CVEsHighest risk
0.00%0.26%0.52%0.78%0.0%0.3%Jun 26Sep 26Oct 26

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

How urgent is this, really

CVE-2026-48923 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 384,534 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected
☕com.rapid7:jenkinsci-appspider-plugin

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

Description

Jenkins AppSpider Plugin 1.0.17 and earlier does not perform a permission check in a method implementing form validation.

This allows attackers with Overall/Read permission to connect to an attacker-specified URL.

AppSpider Plugin 1.0.18 requires Overall/Administer permission to use the affected method implementing form validation.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavencom.rapid7:jenkinsci-appspider-pluginall versions1.0.18com.rapid7:jenkinsci-appspider-plugin:1.0.18

Affected Products

1 product · 1 configurations
Application
appspiderjenkins
< 1.0.18
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 com.rapid7:jenkinsci-appspider-plugin, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update com.rapid7:jenkinsci-appspider-plugin to 1.0.18 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-48923 is resolved across your whole dependency graph.

  3. Workarounds

    Close the privilege gap rather than the entry point: audit which accounts, roles and service identities can reach the affected operation, drop the component to the least privilege it actually needs, and review file and directory permissions created by earlier installs — a default left in place is what makes this reachable.

Frequently Asked Questions

Jenkins AppSpider Plugin 1.0.17 and earlier does not perform a permission check in a method implementing form validation. This allows attackers with Overall/Read permission to connect to an attacker-specified URL. AppSpider Plugin 1.0.18 requires Overall/Administer permission to use the affected method implementing form validation.
O3 Security · Impact-Aware SCA

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CVE-2026-48923: jenkinsci-appspider — Fixed in 1.0.18