CVE-2025-51736: File upload vulnerability in HCL Technologies Ltd

Routine

MEDIUM 6.3DOWNGRADE

CVE-2025-51736 is a medium-severity flaw (CVSS 6.3) affecting unica. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

File upload vulnerability in HCL Technologies Ltd. Unica 12.0.0.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 88%)
CISA exploited list	No
Weakness	CWE-434
Published	2025-11-28
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: hcltech

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-11-28 15:16 UTCPublished CVE record published
2026-06-17 09:35 UTCUpdated Record last modified

hcltech unica DOWNGRADE

Affected: 12.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 12.0.0

1. Check installed version

apt-cache policy unica || rpm -q unica || unica --version

2. No fixed release: DOWNGRADE to a release before 12.0.0 (Debian / Ubuntu)

apt-cache madison unica sudo apt install unica=<VERSION_BEFORE_12.0.0> sudo apt-mark hold unica

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list unica sudo dnf downgrade unica-<VERSION_BEFORE_12.0.0> sudo dnf versionlock add unica

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-51736?

unica: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-51736 being exploited?

CVE-2025-51736 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-51736 affect?

CVE-2025-51736 affects unica. Severity is medium (CVSS 6.3). File upload vulnerability in HCL Technologies Ltd. Unica 12.0.0.

How urgent is CVE-2025-51736?

Priority 25/100. No elevated risk signals yet.

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References

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