Which products and versions are affected by CVE-2023-2523?

Affected: E-Office versions 9.5, >= 9.5. The full list is in the CVE brief.

Is CVE-2023-2523 being exploited in the wild?

It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since May 4, 2023.

Is CVE-2023-2523 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2023-2523?

No public exploit code is known.

Is there a fix for CVE-2023-2523?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2023-2523 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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WatchlistCritical

CVE-2023-2523E-Office Unrestricted File Upload

It has been rated as critical.

Published May 4, 2023 · Updated Nov 21, 2024

Key Facts

Patch immediately

CVE-2023-2523 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting E-Office.
It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since May 4, 2023. No public exploit code is known.
EPSS estimates a 33% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

Scores

CVSS v3.1

9.8

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

EPSS (30-day exploit likelihood)

33%

Higher than 98.3% of all scored CVEs

Exploit maturity

Proof of concept

ATLAS score

41/100

Publication score, see How it works

Exploitation Verdict

KEV listed

May 4, 2023

Federal due date

None

No federal due date

Ransomware use

Not reported

Attributed actors

None named

Exploit & Defence Guidance

Exploit maturity

Proof of concept

Public exploit code

Proof-of-concept links

In-the-wild evidence

Reports of active use

Advisories And Exploit References

advisoryhttps://vuldb.com/?ctiid.228014
advisoryhttps://vuldb.com/?id.228014

Description

A vulnerability was found in Weaver E-Office 9.5. It has been rated as critical. Affected by this issue is some unknown functionality of the file App/Ajax/ajax.php?action=mobile_upload_save.

The manipulation of the argument upload_quwan leads to unrestricted upload. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.

VDB-228014 is the identifier assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
CIRCL KEV	May 4, 2023	n/a	Not reported
Industry KEV feed	May 4, 2023	n/a	Not reported

Affected Products

2 affected entries in total

Product	Affected versions	Fixed in
E-OfficeE-Office	9.5, >= 9.5	n/a

Timeline

Publicly disclosed
May 4, 2023
Added to CIRCL KEV
May 4, 2023
Added to Industry KEV feed
May 4, 2023
Last updated
Nov 21, 2024

Weakness Type

CWE-434 Unrestricted Upload of File with Dangerous Type

References

8 more references in the full CVE brief

FAQ

Common Questions.

A vulnerability was found in Weaver E-Office 9.5.
Affected: E-Office versions 9.5, >= 9.5. The full list is in the CVE brief.
It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since May 4, 2023.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

Is CVE-2023-2523 On Your Attack Surface?

Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.