VulnerabilityPublished 30 Sep 2026

CVE-2026-93462: baserCMS · Missing Authentication

Affects baserCMSSource CVE Database V5

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Not known to be exploited · CVSS 5.3 Medium : upgrade to 5.4.1 or 5.3.1 when convenient.

Data as of 12 Nov 2026, 23:25 UTC

CVSS 3.0 base score

5.3Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.3% chance of exploitation in 30 days – higher than 24% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 5.4.1, 5.3.1

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: None
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 30 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade baserCMS and basercms/basercms to 5.4.1 or 5.3.1.

Affected software

Product	Affected	Fixed in
baserCMS User CommunitybaserCMS	Affected <5.4.1	Fixed in 5.4.1
baserCMS User CommunitybaserCMS	Affected <5.3.1	Fixed in 5.3.1
Packagistbasercms/basercms`pkg:composer/basercms/basercms`Other threats	Affected <5.4.1 <5.3.1	Fixed in 5.4.1 5.3.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

If you cannot patch yet, restrict access to baserCMS administrative functions and monitor for unauthorized access attempts.

Description

CVE-2026-93462 is a vulnerability in baserCMS where a critical function lacks proper authentication. This flaw allows a remote attacker to potentially access sensitive information without authorization. The vulnerability affects baserCMS versions prior to 5.3.1 and 5.4.1. The CVSS score is 5.3, indicating a medium severity level.

Impact

An attacker can remotely exploit the missing authentication to access sensitive information within baserCMS. The confidentiality impact is limited (partial information disclosure), with no impact on integrity or availability. No known exploits are reported in the wild.

Summary

This vulnerability in baserCMS arises from missing authentication checks on a critical function, enabling remote attackers to obtain sensitive information. The issue affects baserCMS versions >=0 and <5.3.1 as well as >=0 and <5.4.1. The CVSS 3.0 vector indicates the attack can be performed remotely without privileges or user interaction, with low complexity and limited confidentiality impact. No integrity or availability impact is noted. There is no information on available patches or vendor advisories.

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 7 Oct 2026, 21:29 UTC

Technical details

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