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Fencer Vulns
medium 6.5

CVE-2020-28463 json

Server-side Request Forgery (SSRF)

published 2021-02-18 5 y ago modified 2026-06-17 4 mo ago also GHSA-mpvw-25mg-59vx , PYSEC-2021-146 , EUVD-2021-0223

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 71%
public exploits
0
none known

Summary

All versions of package reportlab are vulnerable to Server-side Request Forgery (SSRF) via img tags. In order to reduce risk, use trustedSchemes & trustedHosts (see in Reportlab's documentation) Steps to reproduce by Karan Bamal: 1. Download and install the latest package of reportlab 2. Go to demos -> odyssey -> dodyssey 3. In the text file odyssey.txt that needs to be converted to pdf inject <img src="http://127.0.0.1:5000" valign="top"/> 4. Create a nc listener nc -lp 5000 5. Run python3 dodyssey.py 6. You will get a hit on your nc showing we have successfully proceded to send a server side request 7. dodyssey.py will show error since there is no img file on the url, but we are able to do SSRF

Patch / fix

  • pypi reportlab 3.5.55
  • python-reportlab Debian 14, Debian 13, Debian 12 3.5.55-1

debian advisories DEBIAN-CVE-2020-28463

  • python-reportlab SLE Workstation Extension 12 SP5 2.7-3.8.1

suse advisories SUSE-SU-2021:3209-1

  • python-reportlab openSUSE Leap 15.2 3.4.0-lp152.5.3.1
  • python-reportlab openSUSE Leap 15.3 3.4.0-3.6.1

opensuse advisories openSUSE-SU-2021:1147-1openSUSE-SU-2021:2641-1

  • python-reportlab Arch Linux 3.5.55-1

arch linux advisories AVG-1592

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-28463 updated cvss 5.4

python-reportlab: Server-side request forgery via img tags

  • Red Hat Enterprise Linux 6 python-reportlab Red Hat Enterprise Linux 7 python-reportlab
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 python-reportlab, python3-reportlab Red Hat Quay 3 quay/quay-rhel8
    affected: no fix planned “Will not fix”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.35% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • snyk.io https://snyk.io/vuln/SNYK-PYTHON-REPORTLAB-1022145 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 4.0 AV:N/AC:L/Au:S/C:P/I:N/A:N
GitHub 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
pypi reportlab
<3.5.55
3.5.55

Affected products

  • n/a reportlab

Classification

Weakness
  • CWE-918 Server-Side Request Forgery

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.