CVE-2025-30196
MEDIUMCVE-2025-30196 is a medium-severity (CVSS 6.5) Cross-site Scripting (XSS) vulnerability in jenkins anchorchain. O3 Security detects and blocks CVE-2025-30196 exploitation at runtime via eBPF exploit-chain detection and L7 egress monitoring, even on unpatched systems.
Jenkins AnchorChain Plugin 1.0 does not limit URL schemes for links it creates based on workspace content, allowing the `javascript:` scheme, resulting in a stored cross-site scripting…
Description
Jenkins AnchorChain Plugin 1.0 does not limit URL schemes for links it creates based on workspace content, allowing the javascript: scheme, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to control the input file for the Anchor Chain post-build step.
Affected Products
anchorchainjenkinsDetection & mitigation playbook
Vendor / applianceDetect
Inventory every jenkins anchorchain deployment and check each version against the affected-products list above. Because the exploit targets the running system rather than your application code, also watch for exploitation at the network and runtime layer — O3 flags the exploit behaviour from runtime telemetry and egress traffic even before a vulnerable build is confirmed.
Remediation status
No patch has shipped for CVE-2025-30196 yet — track the jenkins anchorchain advisory for a fixed release and apply the workarounds below in the meantime.
Mitigate without a patch
Cut exposure now: restrict the management/admin interface to trusted networks, segment the device, and apply the vendor's recommended configuration mitigations and any WAF/IPS signature. O3's runtime protection blocks the exploit chain at execution, holding the line on unpatched or end-of-life systems until you can patch.
How O3 protects you
O3 detects and blocks CVE-2025-30196 exploitation at runtime: eBPF exploit-chain detection, plus L7 egress monitoring that catches the post-exploitation callback and severs the attacker's outbound channel.
Tailored to CVE-2025-30196. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2025-30196 being exploited in your environment?
O3's eBPF runtime sensors and L7 egress monitoring detect and block the CVE-2025-30196 exploit chain at execution — protecting unpatched and end-of-life systems until the vendor patch is applied.