Vulnerability-Lookup

(CVE-2021-25634)

Vulnerability from cleanstart – Published: 2026-10-31 13:52 – Updated: 2025-10-06 06:13 – Source website

Summary

Details

Security vulnerability affects the libreoffice package. LibreOffice supports digital signatures of ODF documents and macros within documents, presenting visual aids that no alteration of the document occurred since the last signing and that the signature is valid.

Severity

7.5 (High)


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

References

URL

Type

	https://github.com/cleanstart-dev/cleanstart-secu…	ADVISORY
	https://osv.dev/vulnerability/CVE-2021-25634	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2021-25634	WEB

JSON

To clipboard

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  "affected": [
    {
      "package": {
        "ecosystem": "CleanStart",
        "name": "libreoffice",
        "purl": "pkg:apk/cleanstart/libreoffice"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
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            {
              "fixed": "7.2.2.2-r0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [],
  "database_specific": {},
  "details": "Security vulnerability affects the libreoffice package. LibreOffice supports digital signatures of ODF documents and macros within documents, presenting visual aids that no alteration of the document occurred since the last signing and that the signature is valid.",
  "id": "CLEANSTART-2025-VO56255",
  "modified": "2025-10-06T06:13:58Z",
  "published": "2026-10-31T13:52:51.217049Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2025/CLEANSTART-2025-VO56255.json"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2021-25634"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-25634"
    }
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  "related": [],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "LibreOffice supports digital signatures of ODF documents and macros within documents, presenting visual aids that no alteration of the document occurred since the last signing and that the signatur...",
  "upstream": [
    "CVE-2021-25634"
  ]
}

CVE-2021-25634 (GCVE-0-2021-25634)

Vulnerability from cvelistv5 – Published: 2021-10-12 13:33 – Updated: 2024-09-17 00:46

Title

Timestamp Manipulation with Signature Wrapping

Summary

LibreOffice supports digital signatures of ODF documents and macros within documents, presenting visual aids that no alteration of the document occurred since the last signing and that the signature is valid. An Improper Certificate Validation vulnerability in LibreOffice allowed an attacker to modify a digitally signed ODF document to insert an additional signing time timestamp which LibreOffice would incorrectly present as a valid signature signed at the bogus signing time. This issue affects: The Document Foundation LibreOffice 7-0 versions prior to 7.0.6; 7-1 versions prior to 7.1.2.

Severity

No CVSS data available.

CWE

CWE-295 - Improper Certificate Validation

Assigner

Document Fdn. CNA

CNA scorecard C 75/100 over 21 records in the last 180 days details

References

2 references

URL	Tags
https://www.libreoffice.org/about-us/security/adv…	x_refsource_MISC
https://www.debian.org/security/2021/dsa-4988	vendor-advisoryx_refsource_DEBIAN

Impacted products

1 product

Vendor	Product	Version
The Document Foundation	LibreOffice	Affected: 7-0 , < 7.0.6 (custom) Affected: 7-1 , < 7.1.2 (custom)

Date Public

2021-10-11 00:00

Credits

NDS of Ruhr University Bochum

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
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