How severe is CVE-2021-29049?

CVE-2021-29049 has a CVSS score of 6.1/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which products are affected by CVE-2021-29049?

Affected package information for CVE-2021-29049 is not yet fully mapped. Check the official advisory links for details.

How do I patch CVE-2021-29049?

No patch has shipped for CVE-2021-29049 yet — track the liferay digital experience platform advisory for a fixed release and apply the workarounds below in the meantime.

How do I detect CVE-2021-29049 across my infrastructure?

Inventory every liferay digital experience platform 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.

How do I mitigate CVE-2021-29049 if there is no patch (or I can't update yet)?

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 does O3 Security protect against CVE-2021-29049?

O3 detects and blocks CVE-2021-29049 exploitation at runtime: eBPF exploit-chain detection, plus L7 egress monitoring that catches the post-exploitation callback and severs the attacker's outbound channel.

Is CVE-2021-29049 actively exploited in the wild?

No public exploit code has been indexed for CVE-2021-29049 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2021-29049?

CVE-2021-29049 has an EPSS (Exploit Prediction Scoring System) score of 0.8%, placing it in the 50th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2021-29049?

CVE-2021-29049 is classified as Cross-site Scripting (XSS) (CWE-79). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

Which products and versions are affected by CVE-2021-29049?

CVE-2021-29049 affects liferay digital experience platform (3 versions, e.g. 7.0, 7.1, 7.2); liferay dxp (1 version, e.g. 7.3). Check the affected-products list on this page against your deployed version to confirm exposure.

When was CVE-2021-29049 published, and has it been updated?

CVE-2021-29049 was published on June 9, 2021 and was last updated on June 17, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CVE-2021-29049: Digital Experience Platform Cross-site Scriptin…

EPSS Exploitation Probability

via FIRST.org ↗

0.8%probability of exploitation in next 30 days

Lower Risk50th percentile+0.48%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Description

Cross-site scripting (XSS) vulnerability in the Portal Workflow module's edit process page in Liferay DXP 7.0 before fix pack 99, 7.1 before fix pack 23, 7.2 before fix pack 12 and 7.3 before fix pack 1, allows remote attackers to inject arbitrary web script or HTML via the currentURL parameter.

Affected Products

2 products · 104 configurations

Application

digital experience platformliferay

3 versions

7.07.17.2

Application

dxpliferay

1 version

7.3

Detection & mitigation playbook

Vendor / appliance

Detect
Inventory every liferay digital experience platform 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-2021-29049 yet — track the liferay digital experience platform 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-2021-29049 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-2021-29049. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

Cross-site scripting (XSS) vulnerability in the Portal Workflow module's edit process page in Liferay DXP 7.0 before fix pack 99, 7.1 before fix pack 23, 7.2 before fix pack 12 and 7.3 before fix pack 1, allows remote attackers to inject arbitrary web script or HTML via the currentURL parameter.

O3 Security · Runtime Protection

Is CVE-2021-29049 being exploited in your environment?

O3's eBPF runtime sensors and L7 egress monitoring detect and block the CVE-2021-29049 exploit chain at execution — protecting unpatched and end-of-life systems until the vendor patch is applied.

Protect my workloads How runtime protection works

CVE-2021-29049

EPSS Exploitation Probability

Description

Affected Products

Detection & mitigation playbook

Detect

Remediation status

Mitigate without a patch

How O3 protects you

Frequently Asked Questions

Is CVE-2021-29049 being exploited in your environment?