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NVD / CVE Program· CNA Document Fdn.

CVE-2020-12803: XForms submissions could overwrite local files

MediumCVSS 6.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 27/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.7% (FIRST EPSS); higher than 78.2% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: libcmis (AlmaLinux:8) 0.5.2-1.el8; libreoffice-sdk (AlmaLinux:8) 1:6.3.6.2-3.el8.alma; libreoffice-sdk-doc (AlmaLinux:8) 1:6.3.6.2-3.el8.alma.
  • Mentioned 2 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to libcmis (AlmaLinux:8) 0.5.2-1.el8; libreoffice-sdk (AlmaLinux:8) 1:6.3.6.2-3.el8.alma; libreoffice-sdk-doc (AlmaLinux:8) 1:6.3.6.2-3.el8.alma or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

ODF documents can contain forms to be filled out by the user. Similar to HTML forms, the contained form data can be submitted to a URI, for example, to an external web server. To create submittable forms, ODF implements the XForms W3C standard, which allows data to be submitted without the need for macros or other active scripting Prior to version 6.4.4 LibreOffice allowed forms to be submitted to any URI, including file: URIs, enabling form submissions to overwrite local files. User-interaction is required to submit the form, but to avoid the possibility of malicious documents engineered to maximize the possibility of inadvertent user submission this feature has now been limited to http[s] URIs, removing the possibility to overwrite local files. This issue affects: The Document Foundation LibreOffice versions prior to 6.4.4.

Published
Jun 8, 2020
Updated
Jun 16, 2026
EPSS
1.7% · 78th percentile

Report tools

JSON

Action score

27

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 1.7%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2020-12803

When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
libreofficelibreoffice
opensuseleap
fedoraprojectfedora

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Document Fdn.). Independent of NVD's CPE analysis and usually ahead of it.

  • The Document Foundation LibreOffice

    • unspecified and later · before 6.4.4affected

Affected versions

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

  • fedoraproject fedora31
  • libreoffice libreofficebefore 6.4.4
  • opensuse leap15.1

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8libcmisbefore 0.5.2-1.el80.5.2-1.el8
AlmaLinux:8libreoffice-sdkbefore 1:6.3.6.2-3.el8.alma1:6.3.6.2-3.el8.alma
AlmaLinux:8libreoffice-sdk-docbefore 1:6.3.6.2-3.el8.alma1:6.3.6.2-3.el8.alma
Alpine:v3.15libreofficebefore 6.4.4.2-r06.4.4.2-r0
Debian:10libreofficebefore 1:6.1.5-3+deb10u111:6.1.5-3+deb10u11
Debian:12libreofficebefore 1:6.4.4-11:6.4.4-1
openSUSE:Leap 15.1libreofficebefore 6.4.5.2-lp151.3.18.16.4.5.2-lp151.3.18.1
openSUSE:Leap 15.2libreofficebefore 6.4.5.2-lp152.2.3.16.4.5.2-lp152.2.3.1
Red Hat:enterprise_linux:8::appstreamautocorr-afbefore 1:6.3.6.2-3.el81:6.3.6.2-3.el8
Red Hat:enterprise_linux:8::appstreamautocorr-bgbefore 1:6.3.6.2-3.el81:6.3.6.2-3.el8
Red Hat:enterprise_linux:8::appstreamautocorr-cabefore 1:6.3.6.2-3.el81:6.3.6.2-3.el8
Red Hat:enterprise_linux:8::appstreamautocorr-csbefore 1:6.3.6.2-3.el81:6.3.6.2-3.el8
Red Hat:enterprise_linux:8::appstreamautocorr-dabefore 1:6.3.6.2-3.el81:6.3.6.2-3.el8
Red Hat:enterprise_linux:8::appstreamautocorr-debefore 1:6.3.6.2-3.el81:6.3.6.2-3.el8
Red Hat:enterprise_linux:8::appstreamautocorr-enbefore 1:6.3.6.2-3.el81:6.3.6.2-3.el8
Red Hat:enterprise_linux:8::appstreamautocorr-esbefore 1:6.3.6.2-3.el81:6.3.6.2-3.el8
Red Hat:enterprise_linux:8::appstreamautocorr-fabefore 1:6.3.6.2-3.el81:6.3.6.2-3.el8
Red Hat:enterprise_linux:8::appstreamautocorr-fibefore 1:6.3.6.2-3.el81:6.3.6.2-3.el8
Red Hat:enterprise_linux:8::appstreamautocorr-frbefore 1:6.3.6.2-3.el81:6.3.6.2-3.el8
Red Hat:enterprise_linux:8::appstreamautocorr-gabefore 1:6.3.6.2-3.el81:6.3.6.2-3.el8
Red Hat:enterprise_linux:8::appstreamautocorr-hrbefore 1:6.3.6.2-3.el81:6.3.6.2-3.el8
Red Hat:enterprise_linux:8::appstreamautocorr-hubefore 1:6.3.6.2-3.el81:6.3.6.2-3.el8
Red Hat:enterprise_linux:8::appstreamautocorr-isbefore 1:6.3.6.2-3.el81:6.3.6.2-3.el8
Red Hat:enterprise_linux:8::appstreamautocorr-itbefore 1:6.3.6.2-3.el81:6.3.6.2-3.el8

+96

Same product

libreoffice: all records

Other highest-scoring records for the same primary product.

  • CVE-2019-9851LibreLogo global-event script execution
    62This week
  • CVE-2018-16858It was found that libreoffice before versions 6.0.7 and 6.1.3 was vulnerable to a directory traversal attack which could be used to execute…
    60This week
  • CVE-2018-10583An information disclosure vulnerability occurs when LibreOffice 6.0.3 and Apache OpenOffice Writer 4.1.5 automatically process and initiate…
    60This week

Published before and after this one in the same product

  • ← EarlierCVE-2020-12801May 18, 2020 · Crash-recovered MSOffice encrypted documents defaulted to not to using encryption on next save
    21Monitor
  • ← EarlierCVE-2020-12802Jun 8, 2020 · remote graphics contained in docx format retrieved in 'stealth mode'
    22Monitor
  • Later →CVE-2021-25631May 3, 2021 · denylist of executable filename extensions possible to bypass under windows
    37Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:libcmis0.5.2-1.el8 · AlmaLinux:8Package registry (OSV)
almalinux:libreoffice-sdk1:6.3.6.2-3.el8.alma · AlmaLinux:8Package registry (OSV)
almalinux:libreoffice-sdk-doc1:6.3.6.2-3.el8.alma · AlmaLinux:8Package registry (OSV)
alpine:libreoffice6.4.4.2-r0 · Alpine:v3.15Package registry (OSV)
debian:libreoffice1:6.4.4-1 · Debian:12Package registry (OSV)
opensuse:libreoffice6.4.5.2-lp151.3.18.1 · openSUSE:Leap 15.1Package registry (OSV)
red hat:autocorr-af1:6.3.6.2-3.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:autocorr-bg1:6.3.6.2-3.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:autocorr-ca1:6.3.6.2-3.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:autocorr-cs1:6.3.6.2-3.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:autocorr-da1:6.3.6.2-3.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:autocorr-de1:6.3.6.2-3.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:autocorr-en1:6.3.6.2-3.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:autocorr-es1:6.3.6.2-3.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:autocorr-fa1:6.3.6.2-3.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:autocorr-fi1:6.3.6.2-3.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:autocorr-fr1:6.3.6.2-3.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:autocorr-ga1:6.3.6.2-3.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
rocky linux:libcmis0:0.5.2-1.el8 · Rocky Linux:8Package registry (OSV)
suse:libreoffice6.4.5.2-8.22.1 · SUSE:Linux Enterprise Workstation Extension 15 SP1Package registry (OSV)

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.

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
high · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
None
Integrity impact
High
Availability impact
None

Weakness class (CWE)

CWE-20 · Improper Input Validation

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

References

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records