How severe is CVE-2020-29556?

CVE-2020-29556 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-29556 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-29556?

CVE-2020-29556 primarily affects Getgrav Grav Cms. In total, 29 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-29556?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-29556 published?

CVE-2020-29556 was published on 2021-03-15 and last updated on 2026-06-17.

CVE-2020-29556

CVE-2020-29556 is a medium-severity vulnerability in Getgrav Grav Cms with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Getgrav Grav Cms
Published: 2021-03-15
Last modified: 2026-06-17

Description

The Backup functionality in Grav CMS through 1.7.0-rc.17 allows an authenticated attacker to read arbitrary local files on the underlying server by exploiting a path-traversal technique. (This vulnerability can also be exploited by an unauthenticated attacker due to a lack of CSRF protection.)

Frequently asked questions

What is CVE-2020-29556?: The Backup functionality in Grav CMS through 1.7.0-rc.17 allows an authenticated attacker to read arbitrary local files on the underlying server by exploiting a path-traversal technique. (This vulnerability can also be exploited by an unauthenticated attacker due to a lack of CSRF protection.)
How severe is CVE-2020-29556?: CVE-2020-29556 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-29556 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-29556?: CVE-2020-29556 primarily affects Getgrav Grav Cms. In total, 29 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-29556?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-29556 published?: CVE-2020-29556 was published on 2021-03-15 and last updated on 2026-06-17.

References

https://blog.bssi.fr/cve-2020-29553-cve-2020-29555-cve-2020-29556-multiple-vulnerabilities-within-cms-grav/

Affected products (29)

cpe:2.3:a:getgrav:grav_cms:*:*:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:beta1:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:beta10:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:beta2:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:beta3:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:beta4:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:beta5:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:beta6:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:beta7:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:beta8:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:beta9:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:rc1:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:rc10:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:rc11:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:rc12:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:rc13:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:rc14:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:rc15:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:rc16:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:rc17:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:rc2:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:rc20:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:rc3:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:rc4:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:rc5:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:rc6:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:rc7:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:rc8:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav_cms:1.7.0:rc9:*:*:*:*:*:*

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CVE-2020-29553 — High (CVSS 8.8): The Scheduler in Grav CMS through 1.7.0-rc.17 allows an attacker to execute a system command by tricking an admin into…
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CVE-2019-16126 — Medium (CVSS 6.1): Grav through 1.6.15 allows (Stored) Cross-Site Scripting due to JavaScript execution in SVG images.
CVE-2018-5233 — Medium (CVSS 6.1): Cross-site scripting (XSS) vulnerability in system/src/Grav/Common/Twig/Twig.php in Grav CMS before 1.3.0 allows remote…

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