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CVE-2020-19111· NVD / CVE Program· CNA mitre

Incorrect Access Control vulnerability in Online Book Store v1.0 via admin_verify.php, which could let a remote mailicious user bypass authe

Incorrect Access Control vulnerability in Online Book Store v1.0 via admin_verify.php, which could let a remote mailicious user bypass authentication and obtain sensitive information.

CriticalCVSS 9.8 · v3.1—No exploit No fix recorded
Published
May 6, 2021
Updated
Jun 16, 2026
EPSS
1.9% · 79th percentile
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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 · 1.9%

Noroxi analysis

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Affected systems

VendorProduct
projectworldsonline book store project in php

Affected versions

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

  • projectworlds online book store project in php1.0

Same product

projectworlds: all records

Other highest-scoring records for the same primary product.

  • CVE-2020-19114SQL Injection vulnerability in Online Book Store v1.0 via the publisher parameter to edit_book.php, which could let a remote malicious user
    40Plan
  • CVE-2020-19113Arbitrary File Upload vulnerability in Online Book Store v1.0 in admin_add.php, which may lead to remote code execution.
    40Plan
  • CVE-2020-19112SQL Injection vulnerability in Online Book Store v1.0 via the bookisbn parameter to admin_delete.php, which could let a remote malicious use
    40Plan
  • CVE-2020-19109SQL Injection vulnerability in Online Book Store v1.0 via the bookisbn parameter to admin_edit.php, which could let a remote malicious user
    40Plan
  • CVE-2020-19108SQL Injection vulnerability in Online Book Store v1.0 via the pubid parameter to bookPerPub.php, which could let a remote malicious user exe
    40Plan
  • CVE-2020-19107SQL Injection vulnerability in Online Book Store v1.0 via the isbn parameter to edit_book.php, which could let a remote malicious user execu
    40Plan

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.

No credits in the CNA record.

Variant candidates

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

No nightly-computed relations.

Chain candidates

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

—

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