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No exploitation reportedFix available

CVE-2021-45087

No exploitation reported by the sources we read.

  • Published2021-12-16
  • WeaknessCWE-79

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

XSS can occur in GNOME Web (aka Epiphany) before 40.4 and 41.x before 41.1 when View Source mode or Reader mode is used, as demonstrated by a a page title.

Timeline

dates in UTC
  1. 2021-12-1603:15CVE publishedNVD

Versions per branch

NVD
Debian debian linux
BranchAffectedFixed in
10.0= 10.0no fix published
11.0= 11.0no fix published
Gnome epiphany
BranchAffectedFixed in
41.x≥ 41.0, < 41.141.1
40.4< 40.440.4

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • epiphanyopenEuler:22.03-LTSall versions · fixed in 40.6-1.oe2203
  • epiphanyMageia:8all versions · fixed in 3.38.2-1.1.mga8
  • epiphanyCleanStartall versions · fixed in 41.3-r0
  • epiphanyAlpine:v3.24from 41.0 · fixed in 41.3-r0
  • epiphanyAlpine:v3.23from 41.0 · fixed in 41.3-r0
  • epiphanyAlpine:v3.22from 41.0 · fixed in 41.3-r0
  • epiphanyAlpine:v3.21from 41.0 · fixed in 41.3-r0
  • epiphanyAlpine:v3.20from 41.0 · fixed in 41.3-r0

14 more package ranges on OSV.dev

Vendor advisories

  • CVE-2021-45087 Red Hat Product Security

    epiphany: XSS in view source mode or reader mode

Full record on NVD

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

  • EUVD-2021-31878same flawENISA EUVD · LicenseRef-ENISA-legal-notice
  • GHSA-vw96-55hq-p2pgsame flawGitHub Advisory Database · CC-BY-4.0
  • DLA-3074-1advisory covering several CVEsDebian · LicenseRef-unstated
  • DSA-5042-1advisory covering several CVEsDebian · LicenseRef-unstated
  • MGASA-2022-0053advisory covering several CVEsMageia · LicenseRef-unstated
  • OESA-2022-1627advisory covering several CVEsopenEuler · LicenseRef-unstated
  • USN-5561-1advisory covering several CVEsUbuntu

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Published
2021-12-16
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-vw96-55hq-p2pg

Frequently asked questions

What is CVE-2021-45087?

XSS can occur in GNOME Web (aka Epiphany) before 40.4 and 41.x before 41.1 when View Source mode or Reader mode is used, as demonstrated by a a page title.

Is CVE-2021-45087 actively exploited?

Active exploitation of CVE-2021-45087 has not been confirmed. Its EPSS score was 1.6% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-45087?

CVE-2021-45087 has a CVSS v3 base score of 6.1 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

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Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

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Sources for this record