Is CVE-2021-31635 actively exploited?

No active exploitation of CVE-2021-31635 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-31635 be exploited remotely?

Yes. CVE-2021-31635 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-31635?

CVE-2021-31635 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2021-31635

CRITICAL

CVE-2021-31635

NVD-CWE-OtherPublished: June 26, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Server-Side Template Injection (SSTI) vulnerability in jFinal v.4.9.08 allows a remote attacker to execute arbitrary code via the template function.

NVD Source

Risk Analysis

jFinal v.4.9.08 is vulnerable to Server-Side Template Injection, allowing remote attackers to execute arbitrary code. This critical vulnerability is remotely exploitable and carries a CVSS score of 9.8.

There is no known public exploit for this vulnerability, and it is not currently listed in the CISA KEV catalog.

Recommended Action

Update jFinal to a patched version that addresses the template injection vulnerability.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2021-31635 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.