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CVE-2020-25848· NVD / CVE Program· CNA twcert

HGiga MailSherlock - Broken Authentication

Noroxi assessment

Priority: Plan (action score 40/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.6% (FIRST EPSS); higher than 76.2% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Add it to your regular patch cycle. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

HGiga MailSherlock contains weak authentication flaw that attackers grant privilege remotely with default password generation mechanism.

CriticalCVSS 9.8 · v3.1—No exploit No fix recorded
Published
Dec 31, 2020
Updated
Jun 16, 2026
EPSS
1.7% · 76th percentile

Report tools

JSON

Action score

40

Plan

Add it to your regular patch cycle.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 1.7%

CNA vs NVD score

NVD
9.8
CNA · twcert
9.8
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2020-25848

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
hgigamsr45 isherlock-antispam
hgigamsr45 isherlock-audit
hgigamsr45 isherlock-base
hgigamsr45 isherlock-user
hgigamsr45 isherlock-useradmin
hgigassr45 isherlock-antispam
hgigassr45 isherlock-audit
hgigassr45 isherlock-base
hgigassr45 isherlock-user
hgigassr45 isherlock-useradmin

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • hgiga msr45 isherlock-antispambefore 4.5-130
  • hgiga msr45 isherlock-auditbefore 4.5-143
  • hgiga msr45 isherlock-basebefore 4.5-243
  • hgiga msr45 isherlock-userbefore 4.5-114
  • hgiga msr45 isherlock-useradminbefore 4.5-122
  • hgiga ssr45 isherlock-antispambefore 4.5-130
  • hgiga ssr45 isherlock-auditbefore 4.5-143
  • hgiga ssr45 isherlock-basebefore 4.5-243
  • hgiga ssr45 isherlock-userbefore 4.5-114
  • hgiga ssr45 isherlock-useradminbefore 4.5-112

Versions reported by the vendor

Affected version ranges reported by the assigning authority (twcert). Independent of NVD's CPE analysis and usually ahead of it.

  • HGiga MailSherlock MSR45/SSR45

    • unspecified and later · before 243affected
    • unspecified and later · before 114affected
    • unspecified and later · before 122affected
    • unspecified and later · before 143affected
    • unspecified and later · before 130affected

Same product

hgiga: all records

Other highest-scoring records for the same primary product.

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

—

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

  • CVE-2020-357420 days apartHGiga MailSherlock - SQL Injection -1
    30Monitor
  • CVE-2020-357430 days apartHGiga MailSherlock - SQL Injection -3
    30Monitor

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-287 · Improper Authentication

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Root cause

Authentication is added route by route instead of being enforced in one place. When a route added later bypasses the shared middleware, the session check never runs for it.

The bug in code

The whole CWE-287 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
app.use("/admin", requireSession, adminRouter);
// Route added later skips the middlewareapp.post("/admin-api/config", updateConfig);

Fixed

ts
const admin = express.Router();admin.use(requireSession, requireRole("admin"));
admin.post("/config", updateConfig);app.use("/admin", admin);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records