5.8

CVSS Score

3.1

Basic Information

CVE ID

CVE-2021-27908

GHSA ID

GHSA-4hjq-422q-4vpx

EPSS Score

0.30054%

CWE

CWE-74

Published

4/6/2021

Updated

2/5/2024

KEV Status

Technology

PHP

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CVE-2021-27908

CVE-2021-27908: Mautic vulnerable to secret data exfiltration via symfony parameters

Impact

Symfony parameters (which is what Mautic transforms configuration parameters into) can be used within other Symfony parameters by design. However, this also means that an admin who is normally not privy to certain parameters, such as database credentials, could expose them by leveraging any of the free text fields in Mautic’s configuration that are used in publicly facing parts of the application.

For example,

Go to Configuration page -> Landing Page Settings -> Analytics script and enter this: <script> console.log("db password is: %mautic.db_password%"); </script>
Visit any landing page and open the JS dev console. You will see the following message with real instance db password: db password is: <real password>

Risk rating: ModerateCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:L

Patches

Upgrade to 3.3.2

Workarounds

References

For more information

If you have any questions or comments about this advisory:

Email us at security@mautic.org

(GitHub Advisory)

5.8

CVSS Score

3.1

Basic Information

CVE ID

CVE-2021-27908

GHSA ID

GHSA-4hjq-422q-4vpx

EPSS Score

0.30054%

CWE

CWE-74

Published

4/6/2021

Updated

2/5/2024

KEV Status

Technology

PHP

Technical Details

CVSS Vector

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

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
mautic/core	composer	< 3.3.2	3.3.2

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stems from two key mechanisms: 1) The configuration system's parameter merging that accepts untrusted input containing parameter references, and 2) The template rendering system that resolves these references in public-facing contexts. The Configurator::mergeParameters function is vulnerable because it allows parameter injection through user-controlled fields. The TwigExtension::getParameter method is vulnerable because it enables parameter resolution in templates without proper access controls. Together, these functions create a chain that allows admin users to exfiltrate secrets through parameter interpolation in public outputs.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

WAF Protection Rules

WAF Rule

### Imp**t Sym*ony p*r*m*t*rs (w*i** is w**t M*uti* tr*ns*orms *on*i*ur*tion p*r*m*t*rs into) **n ** us** wit*in ot**r Sym*ony p*r*m*t*rs *y **si*n. *ow*v*r, t*is *lso m**ns t**t *n **min w*o is norm*lly not privy to **rt*in p*r*m*t*rs, su** *s **t**

Reasoning

T** vuln*r**ility st*ms *rom two k*y m****nisms: *) T** *on*i*ur*tion syst*m's p*r*m*t*r m*r*in* t**t ****pts untrust** input *ont*inin* p*r*m*t*r r***r*n**s, *n* *) T** t*mpl*t* r*n**rin* syst*m t**t r*solv*s t**s* r***r*n**s in pu*li*-***in* *ont*x

5.8

Basic Information

Concerned about an active attack path?

CVE-2021-27908: Mautic vulnerable to secret data exfiltration via symfony parameters

Impact

Patches

Workarounds

References

For more information

5.8

Basic Information

Technical Details

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

Vulnerability Intelligence
Miggo AI